/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:16:54,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:16:54,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:16:54,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:16:54,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:16:54,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:16:54,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:16:55,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:16:55,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:16:55,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:16:55,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:16:55,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:16:55,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:16:55,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:16:55,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:16:55,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:16:55,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:16:55,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:16:55,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:16:55,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:16:55,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:16:55,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:16:55,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:16:55,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:16:55,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 18:16:55,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:16:55,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:16:55,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:16:55,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:16:55,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:16:55,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:16:55,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:16:55,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:16:55,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:16:55,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:16:55,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:16:55,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:16:55,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:16:55,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:16:55,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:16:55,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:16:55,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:16:55,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:16:55,083 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:16:55,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:16:55,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:16:55,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:16:55,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:16:55,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:16:55,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:16:55,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:16:55,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:16:55,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:16:55,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:16:55,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:16:55,087 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:16:55,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:16:55,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:16:55,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:16:55,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:16:55,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:16:55,437 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:16:55,438 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:16:55,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-07-09 18:16:55,439 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-07-09 18:16:55,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:16:55,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:16:55,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:55,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:16:55,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:16:55,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:55,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:16:55,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:16:55,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:16:55,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... [2021-07-09 18:16:55,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:16:55,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:16:55,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:16:55,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:16:55,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:16:55,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:16:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:16:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:16:55,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:16:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:16:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:16:55,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:16:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:16:55,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:16:55,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:16:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:16:55,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:16:55,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:16:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:16:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:16:55,596 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:16:56,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:16:56,193 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-09 18:16:56,194 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 18:16:56,194 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 18:16:56,194 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-09 18:16:56,195 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-07-09 18:16:56,196 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:56 BoogieIcfgContainer [2021-07-09 18:16:56,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:16:56,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:16:56,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:16:56,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:16:56,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:55" (1/2) ... [2021-07-09 18:16:56,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4573ef48 and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:16:56, skipping insertion in model container [2021-07-09 18:16:56,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:56" (2/2) ... [2021-07-09 18:16:56,207 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-07-09 18:16:56,212 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:16:56,213 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:16:56,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:16:56,213 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:16:56,262 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:16:56,289 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:16:56,314 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:16:56,315 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:16:56,315 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:16:56,315 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:16:56,315 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:16:56,315 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:16:56,315 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:16:56,315 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:16:56,325 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-07-09 18:16:56,343 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:16:56,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:56,352 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:56,353 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-07-09 18:16:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:56,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613464768] [2021-07-09 18:16:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:56,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613464768] [2021-07-09 18:16:56,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613464768] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:56,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:56,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279260653] [2021-07-09 18:16:56,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:56,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:56,516 INFO L87 Difference]: Start difference. First operand has 49 states, 48 states have (on average 3.4375) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:56,564 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-07-09 18:16:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-07-09 18:16:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:56,576 INFO L225 Difference]: With dead ends: 94 [2021-07-09 18:16:56,576 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 18:16:56,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 18:16:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-07-09 18:16:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-07-09 18:16:56,625 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-07-09 18:16:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:56,627 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-07-09 18:16:56,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-07-09 18:16:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:56,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:56,631 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:56,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:16:56,631 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-07-09 18:16:56,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:56,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990713262] [2021-07-09 18:16:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:56,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:56,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990713262] [2021-07-09 18:16:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990713262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127632183] [2021-07-09 18:16:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:16:56,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127632183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:56,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:56,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 18:16:56,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595421416] [2021-07-09 18:16:56,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:16:56,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:16:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:56,940 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:56,972 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-07-09 18:16:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:56,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 16 [2021-07-09 18:16:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:56,976 INFO L225 Difference]: With dead ends: 120 [2021-07-09 18:16:56,976 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 18:16:56,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 18:16:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-07-09 18:16:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-07-09 18:16:56,992 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-07-09 18:16:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:56,993 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-07-09 18:16:56,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-07-09 18:16:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:56,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:56,994 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:16:57,215 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-07-09 18:16:57,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578640761] [2021-07-09 18:16:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578640761] [2021-07-09 18:16:57,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578640761] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:57,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:57,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:57,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511552749] [2021-07-09 18:16:57,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:57,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,294 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,312 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-07-09 18:16:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-07-09 18:16:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,314 INFO L225 Difference]: With dead ends: 129 [2021-07-09 18:16:57,314 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 18:16:57,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 18:16:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-07-09 18:16:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-07-09 18:16:57,329 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-07-09 18:16:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-07-09 18:16:57,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-07-09 18:16:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:57,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,331 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:16:57,331 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-07-09 18:16:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810293536] [2021-07-09 18:16:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810293536] [2021-07-09 18:16:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810293536] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:57,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:57,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:57,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058135037] [2021-07-09 18:16:57,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:57,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,359 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,368 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-07-09 18:16:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-07-09 18:16:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,370 INFO L225 Difference]: With dead ends: 76 [2021-07-09 18:16:57,370 INFO L226 Difference]: Without dead ends: 64 [2021-07-09 18:16:57,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-09 18:16:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-07-09 18:16:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-07-09 18:16:57,377 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-07-09 18:16:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,377 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-07-09 18:16:57,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-07-09 18:16:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:57,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,378 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:16:57,379 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-07-09 18:16:57,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352981180] [2021-07-09 18:16:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352981180] [2021-07-09 18:16:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352981180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146547084] [2021-07-09 18:16:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:16:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146547084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:57,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 18:16:57,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889605671] [2021-07-09 18:16:57,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:16:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:16:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:57,556 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,572 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-07-09 18:16:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 16 [2021-07-09 18:16:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,574 INFO L225 Difference]: With dead ends: 115 [2021-07-09 18:16:57,574 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 18:16:57,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 18:16:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-07-09 18:16:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-07-09 18:16:57,580 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-07-09 18:16:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,580 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-07-09 18:16:57,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-07-09 18:16:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:16:57,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,582 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:57,807 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,807 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-07-09 18:16:57,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428881535] [2021-07-09 18:16:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:57,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428881535] [2021-07-09 18:16:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428881535] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801858806] [2021-07-09 18:16:57,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,840 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,847 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-07-09 18:16:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-07-09 18:16:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,848 INFO L225 Difference]: With dead ends: 57 [2021-07-09 18:16:57,848 INFO L226 Difference]: Without dead ends: 54 [2021-07-09 18:16:57,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-09 18:16:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-07-09 18:16:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-07-09 18:16:57,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-07-09 18:16:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,852 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-07-09 18:16:57,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-07-09 18:16:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:16:57,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,853 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:16:57,855 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-07-09 18:16:57,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179752188] [2021-07-09 18:16:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179752188] [2021-07-09 18:16:57,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179752188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450209004] [2021-07-09 18:16:57,923 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:57,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:16:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450209004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:58,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:58,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 18:16:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729216684] [2021-07-09 18:16:58,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:16:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:16:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:16:58,071 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,124 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-07-09 18:16:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:16:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 17 [2021-07-09 18:16:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,130 INFO L225 Difference]: With dead ends: 93 [2021-07-09 18:16:58,130 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 18:16:58,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:16:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 18:16:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-07-09 18:16:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-07-09 18:16:58,135 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-07-09 18:16:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,135 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-07-09 18:16:58,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-07-09 18:16:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:58,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,136 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:58,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:58,369 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-07-09 18:16:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:58,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109478553] [2021-07-09 18:16:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109478553] [2021-07-09 18:16:58,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109478553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309197751] [2021-07-09 18:16:58,486 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:58,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:16:58,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:16:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309197751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:58,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:58,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:16:58,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237950048] [2021-07-09 18:16:58,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:58,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:58,830 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,937 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-07-09 18:16:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:16:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,939 INFO L225 Difference]: With dead ends: 144 [2021-07-09 18:16:58,939 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 18:16:58,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:16:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 18:16:58,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-07-09 18:16:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-07-09 18:16:58,954 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-07-09 18:16:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,955 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-07-09 18:16:58,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-07-09 18:16:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:58,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,960 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:59,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,161 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-07-09 18:16:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:59,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060964612] [2021-07-09 18:16:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060964612] [2021-07-09 18:16:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060964612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900179661] [2021-07-09 18:16:59,261 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:16:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900179661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:59,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:16:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68428143] [2021-07-09 18:16:59,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:59,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:59,430 INFO L87 Difference]: Start difference. First operand 106 states and 370 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:59,475 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-07-09 18:16:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 18 [2021-07-09 18:16:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:59,477 INFO L225 Difference]: With dead ends: 179 [2021-07-09 18:16:59,477 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 18:16:59,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 18:16:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-07-09 18:16:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-07-09 18:16:59,482 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-07-09 18:16:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:59,482 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-07-09 18:16:59,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-07-09 18:16:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:59,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:59,483 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:59,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:16:59,707 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-07-09 18:16:59,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:59,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103427142] [2021-07-09 18:16:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103427142] [2021-07-09 18:16:59,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103427142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038641916] [2021-07-09 18:16:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:16:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038641916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:59,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-09 18:17:00,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99708919] [2021-07-09 18:17:00,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:17:00,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:17:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:17:00,004 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,092 INFO L93 Difference]: Finished difference Result 214 states and 744 transitions. [2021-07-09 18:17:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:17:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:17:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,097 INFO L225 Difference]: With dead ends: 214 [2021-07-09 18:17:00,097 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 18:17:00,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:17:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 18:17:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-07-09 18:17:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.751552795031056) internal successors, (604), 161 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-07-09 18:17:00,107 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-07-09 18:17:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,107 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-07-09 18:17:00,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-07-09 18:17:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:17:00,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,108 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,321 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-07-09 18:17:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052116398] [2021-07-09 18:17:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052116398] [2021-07-09 18:17:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052116398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647712157] [2021-07-09 18:17:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:17:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647712157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:00,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-09 18:17:00,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179850255] [2021-07-09 18:17:00,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:17:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:17:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:17:00,605 INFO L87 Difference]: Start difference. First operand 162 states and 604 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,619 INFO L93 Difference]: Finished difference Result 134 states and 469 transitions. [2021-07-09 18:17:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:17:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 18 [2021-07-09 18:17:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,621 INFO L225 Difference]: With dead ends: 134 [2021-07-09 18:17:00,621 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 18:17:00,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:17:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 18:17:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-07-09 18:17:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.624) internal successors, (453), 125 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-07-09 18:17:00,626 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-07-09 18:17:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,626 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-07-09 18:17:00,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-07-09 18:17:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:17:00,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,627 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,849 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-07-09 18:17:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240274616] [2021-07-09 18:17:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:00,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240274616] [2021-07-09 18:17:00,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240274616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466137487] [2021-07-09 18:17:00,917 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:17:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:01,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:01,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:01,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:01,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:01,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:01,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-09 18:17:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466137487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:01,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:17:01,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761753356] [2021-07-09 18:17:01,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:17:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:01,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:17:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:17:01,260 INFO L87 Difference]: Start difference. First operand 126 states and 453 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:01,436 INFO L93 Difference]: Finished difference Result 144 states and 499 transitions. [2021-07-09 18:17:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:17:01,437 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:17:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:01,438 INFO L225 Difference]: With dead ends: 144 [2021-07-09 18:17:01,438 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 18:17:01,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 18:17:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-07-09 18:17:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.5757575757575757) internal successors, (472), 132 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-07-09 18:17:01,442 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-07-09 18:17:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:01,442 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-07-09 18:17:01,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-07-09 18:17:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:17:01,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:01,443 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:01,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:17:01,653 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-07-09 18:17:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:01,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149581422] [2021-07-09 18:17:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:01,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149581422] [2021-07-09 18:17:01,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149581422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225481225] [2021-07-09 18:17:01,718 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:01,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:17:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225481225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:02,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 18:17:02,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968008260] [2021-07-09 18:17:02,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:17:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:17:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:17:02,007 INFO L87 Difference]: Start difference. First operand 133 states and 472 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:02,112 INFO L93 Difference]: Finished difference Result 261 states and 960 transitions. [2021-07-09 18:17:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:17:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2021-07-09 18:17:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:02,114 INFO L225 Difference]: With dead ends: 261 [2021-07-09 18:17:02,114 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 18:17:02,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 18:17:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-07-09 18:17:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.9404761904761907) internal successors, (662), 168 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-07-09 18:17:02,121 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-07-09 18:17:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:02,121 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-07-09 18:17:02,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-07-09 18:17:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:02,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:02,122 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:02,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:17:02,337 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-07-09 18:17:02,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:02,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523460365] [2021-07-09 18:17:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523460365] [2021-07-09 18:17:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523460365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443751433] [2021-07-09 18:17:02,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:02,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:17:02,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:02,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:17:02,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:02,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:02,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:02,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:02,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:02,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:02,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-09 18:17:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443751433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:02,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:17:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114149455] [2021-07-09 18:17:02,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:02,801 INFO L87 Difference]: Start difference. First operand 169 states and 662 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:03,002 INFO L93 Difference]: Finished difference Result 287 states and 1060 transitions. [2021-07-09 18:17:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:17:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2021-07-09 18:17:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:03,004 INFO L225 Difference]: With dead ends: 287 [2021-07-09 18:17:03,004 INFO L226 Difference]: Without dead ends: 275 [2021-07-09 18:17:03,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-09 18:17:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-07-09 18:17:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 4.0) internal successors, (752), 188 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-07-09 18:17:03,011 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-07-09 18:17:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:03,011 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-07-09 18:17:03,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-07-09 18:17:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:03,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:03,014 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:03,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:03,229 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-07-09 18:17:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068118485] [2021-07-09 18:17:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:03,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:03,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068118485] [2021-07-09 18:17:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068118485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:03,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834975606] [2021-07-09 18:17:03,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:03,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:03,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:17:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834975606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 18:17:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261287193] [2021-07-09 18:17:03,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:03,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:03,561 INFO L87 Difference]: Start difference. First operand 189 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:03,643 INFO L93 Difference]: Finished difference Result 211 states and 810 transitions. [2021-07-09 18:17:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:17:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 20 [2021-07-09 18:17:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:03,647 INFO L225 Difference]: With dead ends: 211 [2021-07-09 18:17:03,647 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 18:17:03,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 18:17:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-07-09 18:17:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.968421052631579) internal successors, (754), 190 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-07-09 18:17:03,656 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-07-09 18:17:03,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:03,657 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-07-09 18:17:03,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-07-09 18:17:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:03,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:03,658 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:03,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:17:03,873 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-07-09 18:17:03,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:03,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41945943] [2021-07-09 18:17:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41945943] [2021-07-09 18:17:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41945943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906534033] [2021-07-09 18:17:04,047 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 [2021-07-09 18:17:04,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:04,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:17:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:04,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:04,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:04,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:04,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-09 18:17:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906534033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:04,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 18:17:04,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343956699] [2021-07-09 18:17:04,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:17:04,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:17:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:17:04,329 INFO L87 Difference]: Start difference. First operand 191 states and 754 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:04,454 INFO L93 Difference]: Finished difference Result 509 states and 2067 transitions. [2021-07-09 18:17:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:04,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 20 [2021-07-09 18:17:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:04,458 INFO L225 Difference]: With dead ends: 509 [2021-07-09 18:17:04,458 INFO L226 Difference]: Without dead ends: 504 [2021-07-09 18:17:04,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-07-09 18:17:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-07-09 18:17:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 4.37984496124031) internal successors, (1130), 258 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-07-09 18:17:04,469 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-07-09 18:17:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:04,469 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-07-09 18:17:04,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-07-09 18:17:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:04,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:04,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:04,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:17:04,685 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-07-09 18:17:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:04,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173946966] [2021-07-09 18:17:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:04,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173946966] [2021-07-09 18:17:04,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173946966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847578124] [2021-07-09 18:17:04,750 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:04,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:17:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:17:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847578124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:05,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:17:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760249886] [2021-07-09 18:17:05,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:05,072 INFO L87 Difference]: Start difference. First operand 259 states and 1130 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:05,201 INFO L93 Difference]: Finished difference Result 494 states and 2044 transitions. [2021-07-09 18:17:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:17:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:05,205 INFO L225 Difference]: With dead ends: 494 [2021-07-09 18:17:05,205 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 18:17:05,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 18:17:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-07-09 18:17:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 4.494736842105263) internal successors, (1281), 285 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-07-09 18:17:05,217 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-07-09 18:17:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:05,217 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-07-09 18:17:05,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-07-09 18:17:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:05,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:05,219 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:05,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:17:05,433 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-07-09 18:17:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:05,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249082211] [2021-07-09 18:17:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249082211] [2021-07-09 18:17:05,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249082211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209293573] [2021-07-09 18:17:05,501 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:05,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:05,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:05,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:17:05,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209293573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:05,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 18:17:05,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896304818] [2021-07-09 18:17:05,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:17:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:17:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:17:05,682 INFO L87 Difference]: Start difference. First operand 286 states and 1281 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:05,737 INFO L93 Difference]: Finished difference Result 345 states and 1496 transitions. [2021-07-09 18:17:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:17:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 20 [2021-07-09 18:17:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:05,740 INFO L225 Difference]: With dead ends: 345 [2021-07-09 18:17:05,740 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 18:17:05,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 18:17:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-07-09 18:17:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.505119453924915) internal successors, (1320), 293 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-07-09 18:17:05,750 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-07-09 18:17:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:05,750 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-07-09 18:17:05,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-07-09 18:17:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:05,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:05,751 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:05,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:05,973 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-07-09 18:17:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:05,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953846601] [2021-07-09 18:17:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:06,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:06,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953846601] [2021-07-09 18:17:06,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953846601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:06,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945889509] [2021-07-09 18:17:06,119 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:17:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:06,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:06,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:06,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:06,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:06,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:06,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:06,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:06,362 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-07-09 18:17:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:06,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945889509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:06,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:06,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 18:17:06,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920686231] [2021-07-09 18:17:06,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:06,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:06,455 INFO L87 Difference]: Start difference. First operand 294 states and 1320 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:06,688 INFO L93 Difference]: Finished difference Result 411 states and 1659 transitions. [2021-07-09 18:17:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:17:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:06,691 INFO L225 Difference]: With dead ends: 411 [2021-07-09 18:17:06,691 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 18:17:06,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 18:17:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-07-09 18:17:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 321 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-07-09 18:17:06,703 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-07-09 18:17:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-07-09 18:17:06,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-07-09 18:17:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:06,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:06,704 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:06,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:17:06,929 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-07-09 18:17:06,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:06,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440807729] [2021-07-09 18:17:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440807729] [2021-07-09 18:17:07,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440807729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226852842] [2021-07-09 18:17:07,031 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:07,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:07,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:07,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:07,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:07,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:07,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:07,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:07,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:07,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-07-09 18:17:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226852842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:07,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:17:07,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434253849] [2021-07-09 18:17:07,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:07,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:07,398 INFO L87 Difference]: Start difference. First operand 322 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:07,712 INFO L93 Difference]: Finished difference Result 868 states and 3551 transitions. [2021-07-09 18:17:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:07,718 INFO L225 Difference]: With dead ends: 868 [2021-07-09 18:17:07,718 INFO L226 Difference]: Without dead ends: 841 [2021-07-09 18:17:07,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-09 18:17:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-07-09 18:17:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.545893719806763) internal successors, (1882), 414 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-07-09 18:17:07,735 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-07-09 18:17:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-07-09 18:17:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-07-09 18:17:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:07,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:07,737 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:07,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:17:07,960 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-07-09 18:17:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:07,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973587467] [2021-07-09 18:17:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:08,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973587467] [2021-07-09 18:17:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973587467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051830111] [2021-07-09 18:17:08,062 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:08,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:17:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051830111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:08,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:17:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905333475] [2021-07-09 18:17:08,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:08,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:08,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:08,343 INFO L87 Difference]: Start difference. First operand 415 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:08,401 INFO L93 Difference]: Finished difference Result 431 states and 1910 transitions. [2021-07-09 18:17:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:17:08,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:08,405 INFO L225 Difference]: With dead ends: 431 [2021-07-09 18:17:08,405 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 18:17:08,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 18:17:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-07-09 18:17:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.531400966183575) internal successors, (1876), 414 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-07-09 18:17:08,418 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-07-09 18:17:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:08,419 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-07-09 18:17:08,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-07-09 18:17:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:08,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:08,421 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:08,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:08,643 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-07-09 18:17:08,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:08,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941848448] [2021-07-09 18:17:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:08,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941848448] [2021-07-09 18:17:08,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941848448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531312263] [2021-07-09 18:17:08,726 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:08,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:17:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:09,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531312263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:09,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:09,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:17:09,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786992671] [2021-07-09 18:17:09,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:09,038 INFO L87 Difference]: Start difference. First operand 415 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:09,234 INFO L93 Difference]: Finished difference Result 1022 states and 4384 transitions. [2021-07-09 18:17:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:09,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:09,241 INFO L225 Difference]: With dead ends: 1022 [2021-07-09 18:17:09,242 INFO L226 Difference]: Without dead ends: 1006 [2021-07-09 18:17:09,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-07-09 18:17:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-07-09 18:17:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 4.792048929663609) internal successors, (3134), 654 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-07-09 18:17:09,272 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-07-09 18:17:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:09,272 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-07-09 18:17:09,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-07-09 18:17:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:09,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:09,275 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:09,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:17:09,489 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-07-09 18:17:09,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:09,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965360196] [2021-07-09 18:17:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:09,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:09,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965360196] [2021-07-09 18:17:09,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965360196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:09,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719315844] [2021-07-09 18:17:09,616 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:09,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719315844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-09 18:17:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147379406] [2021-07-09 18:17:09,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:09,860 INFO L87 Difference]: Start difference. First operand 655 states and 3134 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:09,965 INFO L93 Difference]: Finished difference Result 715 states and 3326 transitions. [2021-07-09 18:17:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:09,970 INFO L225 Difference]: With dead ends: 715 [2021-07-09 18:17:09,970 INFO L226 Difference]: Without dead ends: 713 [2021-07-09 18:17:09,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-09 18:17:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-07-09 18:17:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-07-09 18:17:09,991 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-07-09 18:17:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:09,992 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-07-09 18:17:09,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-07-09 18:17:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:09,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:09,994 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:10,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:17:10,209 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-07-09 18:17:10,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:10,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831728153] [2021-07-09 18:17:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:10,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:10,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831728153] [2021-07-09 18:17:10,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831728153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:10,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549342760] [2021-07-09 18:17:10,292 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:17:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:10,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:10,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:10,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:10,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-07-09 18:17:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549342760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:10,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:10,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:17:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848725474] [2021-07-09 18:17:10,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:10,543 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:10,682 INFO L93 Difference]: Finished difference Result 745 states and 3433 transitions. [2021-07-09 18:17:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:17:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:10,687 INFO L225 Difference]: With dead ends: 745 [2021-07-09 18:17:10,688 INFO L226 Difference]: Without dead ends: 740 [2021-07-09 18:17:10,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-07-09 18:17:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-07-09 18:17:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-07-09 18:17:10,709 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-07-09 18:17:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:10,709 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-07-09 18:17:10,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-07-09 18:17:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:10,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:10,712 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:10,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:17:10,925 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-07-09 18:17:10,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:10,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313452908] [2021-07-09 18:17:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313452908] [2021-07-09 18:17:11,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313452908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495685774] [2021-07-09 18:17:11,060 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 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 [2021-07-09 18:17:11,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:17:11,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495685774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:11,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-09 18:17:11,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113142296] [2021-07-09 18:17:11,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:11,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:11,293 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:11,540 INFO L93 Difference]: Finished difference Result 706 states and 3296 transitions. [2021-07-09 18:17:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:17:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:11,552 INFO L225 Difference]: With dead ends: 706 [2021-07-09 18:17:11,552 INFO L226 Difference]: Without dead ends: 704 [2021-07-09 18:17:11,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-07-09 18:17:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-07-09 18:17:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 4.774436090225564) internal successors, (3175), 665 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-07-09 18:17:11,590 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-07-09 18:17:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:11,591 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-07-09 18:17:11,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-07-09 18:17:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:11,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:11,594 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:17:11,801 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-07-09 18:17:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073646273] [2021-07-09 18:17:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073646273] [2021-07-09 18:17:11,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073646273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860519228] [2021-07-09 18:17:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:17:11,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860519228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:12,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:17:12,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460426367] [2021-07-09 18:17:12,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:12,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:12,125 INFO L87 Difference]: Start difference. First operand 666 states and 3175 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:12,416 INFO L93 Difference]: Finished difference Result 1302 states and 5669 transitions. [2021-07-09 18:17:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:12,425 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 18:17:12,425 INFO L226 Difference]: Without dead ends: 1272 [2021-07-09 18:17:12,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-09 18:17:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-07-09 18:17:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 4.794836956521739) internal successors, (3529), 736 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-07-09 18:17:12,456 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-07-09 18:17:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:12,456 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-07-09 18:17:12,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-07-09 18:17:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:17:12,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:12,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:12,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:12,673 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-07-09 18:17:12,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:12,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056119469] [2021-07-09 18:17:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:12,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:12,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056119469] [2021-07-09 18:17:12,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056119469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095038248] [2021-07-09 18:17:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:17:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:17:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:13,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095038248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:13,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:13,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:17:13,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777725370] [2021-07-09 18:17:13,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:13,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:13,168 INFO L87 Difference]: Start difference. First operand 737 states and 3529 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:13,501 INFO L93 Difference]: Finished difference Result 910 states and 3945 transitions. [2021-07-09 18:17:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:17:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:13,508 INFO L225 Difference]: With dead ends: 910 [2021-07-09 18:17:13,508 INFO L226 Difference]: Without dead ends: 881 [2021-07-09 18:17:13,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-07-09 18:17:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-07-09 18:17:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 4.806020066889632) internal successors, (2874), 598 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-07-09 18:17:13,528 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-07-09 18:17:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:13,528 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-07-09 18:17:13,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-07-09 18:17:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:13,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:13,530 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:13,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:17:13,753 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-07-09 18:17:13,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:13,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650579542] [2021-07-09 18:17:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:13,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650579542] [2021-07-09 18:17:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650579542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817261581] [2021-07-09 18:17:13,893 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 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 [2021-07-09 18:17:13,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817261581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:14,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:14,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128829588] [2021-07-09 18:17:14,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:14,175 INFO L87 Difference]: Start difference. First operand 599 states and 2874 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:14,411 INFO L93 Difference]: Finished difference Result 792 states and 3525 transitions. [2021-07-09 18:17:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:14,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:14,415 INFO L225 Difference]: With dead ends: 792 [2021-07-09 18:17:14,415 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 18:17:14,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 18:17:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-07-09 18:17:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 4.821192052980132) internal successors, (2912), 604 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-07-09 18:17:14,434 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-07-09 18:17:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:14,435 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-07-09 18:17:14,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-07-09 18:17:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:14,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:14,437 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:14,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:14,659 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:14,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-07-09 18:17:14,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:14,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132734937] [2021-07-09 18:17:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:14,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132734937] [2021-07-09 18:17:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132734937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:14,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484870079] [2021-07-09 18:17:14,759 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 [2021-07-09 18:17:14,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:17:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:14,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:14,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:14,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:14,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:14,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:14,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-07-09 18:17:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484870079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:15,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-09 18:17:15,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423384882] [2021-07-09 18:17:15,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:15,127 INFO L87 Difference]: Start difference. First operand 605 states and 2912 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:15,410 INFO L93 Difference]: Finished difference Result 1203 states and 5352 transitions. [2021-07-09 18:17:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:15,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:15,428 INFO L225 Difference]: With dead ends: 1203 [2021-07-09 18:17:15,429 INFO L226 Difference]: Without dead ends: 1179 [2021-07-09 18:17:15,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-09 18:17:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-07-09 18:17:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.96025641025641) internal successors, (3869), 780 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-07-09 18:17:15,456 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-07-09 18:17:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:15,456 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-07-09 18:17:15,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-07-09 18:17:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:15,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:15,459 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 18:17:15,673 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-07-09 18:17:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614331563] [2021-07-09 18:17:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614331563] [2021-07-09 18:17:15,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614331563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522231269] [2021-07-09 18:17:15,828 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 [2021-07-09 18:17:15,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:17:15,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:17:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:16,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522231269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:16,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:16,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389973687] [2021-07-09 18:17:16,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:16,193 INFO L87 Difference]: Start difference. First operand 781 states and 3869 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:16,640 INFO L93 Difference]: Finished difference Result 869 states and 4146 transitions. [2021-07-09 18:17:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:16,656 INFO L225 Difference]: With dead ends: 869 [2021-07-09 18:17:16,656 INFO L226 Difference]: Without dead ends: 864 [2021-07-09 18:17:16,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-07-09 18:17:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-07-09 18:17:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 4.963197969543147) internal successors, (3911), 788 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-07-09 18:17:16,681 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-07-09 18:17:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:16,681 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-07-09 18:17:16,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-07-09 18:17:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:16,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:16,684 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:16,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:17:16,908 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:16,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-07-09 18:17:16,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:16,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497305986] [2021-07-09 18:17:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:17,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:17,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497305986] [2021-07-09 18:17:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497305986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170425098] [2021-07-09 18:17:17,035 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 [2021-07-09 18:17:17,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:17:17,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:17,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:17,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:17,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:17,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:17,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-07-09 18:17:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:17,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170425098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:17,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:17,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 18:17:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683209823] [2021-07-09 18:17:17,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:17,310 INFO L87 Difference]: Start difference. First operand 789 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:17,549 INFO L93 Difference]: Finished difference Result 1170 states and 5326 transitions. [2021-07-09 18:17:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:17,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:17,553 INFO L225 Difference]: With dead ends: 1170 [2021-07-09 18:17:17,553 INFO L226 Difference]: Without dead ends: 1162 [2021-07-09 18:17:17,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-09 18:17:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-07-09 18:17:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.951732673267327) internal successors, (4001), 808 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-07-09 18:17:17,579 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-07-09 18:17:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:17,579 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-07-09 18:17:17,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-07-09 18:17:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:17,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:17,582 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:17,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:17:17,797 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-07-09 18:17:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:17,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381232001] [2021-07-09 18:17:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:17,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:17,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381232001] [2021-07-09 18:17:17,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381232001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:17,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041827418] [2021-07-09 18:17:17,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:17:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:18,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:18,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:18,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:18,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:18,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:17:18,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-07-09 18:17:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:18,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041827418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:18,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:18,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-09 18:17:18,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491030375] [2021-07-09 18:17:18,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:18,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:18,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:18,288 INFO L87 Difference]: Start difference. First operand 809 states and 4001 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:18,404 INFO L93 Difference]: Finished difference Result 958 states and 4478 transitions. [2021-07-09 18:17:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-07-09 18:17:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:18,408 INFO L225 Difference]: With dead ends: 958 [2021-07-09 18:17:18,408 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 18:17:18,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 18:17:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-07-09 18:17:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 4.922794117647059) internal successors, (4017), 816 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-07-09 18:17:18,430 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-07-09 18:17:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:18,430 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-07-09 18:17:18,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-07-09 18:17:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:18,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:18,433 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:18,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:18,649 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-07-09 18:17:18,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:18,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711936551] [2021-07-09 18:17:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711936551] [2021-07-09 18:17:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711936551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570328301] [2021-07-09 18:17:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:18,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570328301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:19,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:19,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600989721] [2021-07-09 18:17:19,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:19,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:19,027 INFO L87 Difference]: Start difference. First operand 817 states and 4017 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:19,327 INFO L93 Difference]: Finished difference Result 1066 states and 4874 transitions. [2021-07-09 18:17:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:17:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:19,332 INFO L225 Difference]: With dead ends: 1066 [2021-07-09 18:17:19,332 INFO L226 Difference]: Without dead ends: 1039 [2021-07-09 18:17:19,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-09 18:17:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-07-09 18:17:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 4.927033492822966) internal successors, (4119), 836 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-07-09 18:17:19,358 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-07-09 18:17:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:19,358 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-07-09 18:17:19,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-07-09 18:17:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:19,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:19,361 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:19,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:17:19,577 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-07-09 18:17:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:19,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402205890] [2021-07-09 18:17:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402205890] [2021-07-09 18:17:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402205890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146111836] [2021-07-09 18:17:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146111836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:19,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358087747] [2021-07-09 18:17:19,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:19,940 INFO L87 Difference]: Start difference. First operand 837 states and 4119 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:20,075 INFO L93 Difference]: Finished difference Result 896 states and 4308 transitions. [2021-07-09 18:17:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:20,078 INFO L225 Difference]: With dead ends: 896 [2021-07-09 18:17:20,078 INFO L226 Difference]: Without dead ends: 891 [2021-07-09 18:17:20,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-09 18:17:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-07-09 18:17:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 4.915576694411415) internal successors, (4134), 841 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-07-09 18:17:20,099 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-07-09 18:17:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:20,100 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-07-09 18:17:20,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-07-09 18:17:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:20,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:20,102 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:20,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:20,317 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-07-09 18:17:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:20,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962719947] [2021-07-09 18:17:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:20,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:20,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962719947] [2021-07-09 18:17:20,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962719947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:20,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615828621] [2021-07-09 18:17:20,453 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:20,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:20,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:20,974 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-07-09 18:17:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:20,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,014 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-07-09 18:17:21,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-07-09 18:17:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:21,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615828621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:21,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:21,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824912915] [2021-07-09 18:17:21,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:21,061 INFO L87 Difference]: Start difference. First operand 842 states and 4134 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:21,407 INFO L93 Difference]: Finished difference Result 947 states and 4449 transitions. [2021-07-09 18:17:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-07-09 18:17:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:21,410 INFO L225 Difference]: With dead ends: 947 [2021-07-09 18:17:21,410 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 18:17:21,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 18:17:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-07-09 18:17:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 4.914893617021277) internal successors, (4158), 846 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-07-09 18:17:21,429 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-07-09 18:17:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:21,429 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-07-09 18:17:21,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-07-09 18:17:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:21,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:21,431 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:21,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:21,635 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-07-09 18:17:21,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:21,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658786963] [2021-07-09 18:17:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:21,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:21,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658786963] [2021-07-09 18:17:21,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658786963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654086828] [2021-07-09 18:17:21,697 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:21,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:17:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:21,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-09 18:17:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:21,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654086828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:21,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:17:21,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794581670] [2021-07-09 18:17:21,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:21,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:21,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:21,909 INFO L87 Difference]: Start difference. First operand 847 states and 4158 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:22,141 INFO L93 Difference]: Finished difference Result 1380 states and 6250 transitions. [2021-07-09 18:17:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:22,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:22,147 INFO L225 Difference]: With dead ends: 1380 [2021-07-09 18:17:22,148 INFO L226 Difference]: Without dead ends: 1371 [2021-07-09 18:17:22,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-07-09 18:17:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-07-09 18:17:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.988901220865705) internal successors, (4495), 901 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-07-09 18:17:22,178 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-07-09 18:17:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:22,178 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-07-09 18:17:22,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-07-09 18:17:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:22,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:22,182 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:22,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 18:17:22,383 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:22,383 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-07-09 18:17:22,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:22,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836723612] [2021-07-09 18:17:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:22,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:22,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836723612] [2021-07-09 18:17:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836723612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963426196] [2021-07-09 18:17:22,468 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:22,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:22,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963426196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:22,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:22,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 18:17:22,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453027898] [2021-07-09 18:17:22,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:22,878 INFO L87 Difference]: Start difference. First operand 902 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:23,185 INFO L93 Difference]: Finished difference Result 929 states and 4570 transitions. [2021-07-09 18:17:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:17:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:23,189 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:17:23,189 INFO L226 Difference]: Without dead ends: 927 [2021-07-09 18:17:23,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:23,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-09 18:17:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-07-09 18:17:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.973568281938326) internal successors, (4516), 908 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-07-09 18:17:23,212 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-07-09 18:17:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:23,213 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-07-09 18:17:23,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-07-09 18:17:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:23,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:23,215 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:23,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:23,437 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-07-09 18:17:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:23,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796990265] [2021-07-09 18:17:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:23,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:23,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796990265] [2021-07-09 18:17:23,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796990265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:23,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428938222] [2021-07-09 18:17:23,631 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:23,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:23,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:24,038 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 18:17:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:24,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428938222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:24,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:24,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-09 18:17:24,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951267271] [2021-07-09 18:17:24,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:24,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:24,073 INFO L87 Difference]: Start difference. First operand 909 states and 4516 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:24,460 INFO L93 Difference]: Finished difference Result 936 states and 4581 transitions. [2021-07-09 18:17:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:24,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-07-09 18:17:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:24,464 INFO L225 Difference]: With dead ends: 936 [2021-07-09 18:17:24,464 INFO L226 Difference]: Without dead ends: 934 [2021-07-09 18:17:24,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-07-09 18:17:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-07-09 18:17:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.970198675496689) internal successors, (4503), 906 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-07-09 18:17:24,487 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-07-09 18:17:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:24,487 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-07-09 18:17:24,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-07-09 18:17:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:24,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:24,490 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:24,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:17:24,713 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:24,713 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-07-09 18:17:24,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:24,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637138716] [2021-07-09 18:17:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:24,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:24,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637138716] [2021-07-09 18:17:24,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637138716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:24,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562400838] [2021-07-09 18:17:24,808 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:24,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:25,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562400838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:25,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:25,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 18:17:25,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943186665] [2021-07-09 18:17:25,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:25,256 INFO L87 Difference]: Start difference. First operand 907 states and 4503 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:25,480 INFO L93 Difference]: Finished difference Result 929 states and 4558 transitions. [2021-07-09 18:17:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:17:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:25,483 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:17:25,483 INFO L226 Difference]: Without dead ends: 928 [2021-07-09 18:17:25,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-07-09 18:17:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-07-09 18:17:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 4.965821389195149) internal successors, (4504), 907 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-07-09 18:17:25,507 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-07-09 18:17:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:25,507 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-07-09 18:17:25,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-07-09 18:17:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:25,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:25,510 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:25,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:25,733 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-07-09 18:17:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:25,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450483142] [2021-07-09 18:17:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:25,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450483142] [2021-07-09 18:17:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450483142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:25,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960983359] [2021-07-09 18:17:25,852 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:17:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960983359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:26,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:17:26,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154181565] [2021-07-09 18:17:26,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:26,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:26,362 INFO L87 Difference]: Start difference. First operand 908 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:26,611 INFO L93 Difference]: Finished difference Result 952 states and 4606 transitions. [2021-07-09 18:17:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:26,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:26,614 INFO L225 Difference]: With dead ends: 952 [2021-07-09 18:17:26,614 INFO L226 Difference]: Without dead ends: 950 [2021-07-09 18:17:26,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-07-09 18:17:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-07-09 18:17:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.942541436464088) internal successors, (4473), 905 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-07-09 18:17:26,634 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-07-09 18:17:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:26,634 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-07-09 18:17:26,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-07-09 18:17:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:26,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:26,637 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:26,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:17:26,860 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-07-09 18:17:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:26,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795548019] [2021-07-09 18:17:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795548019] [2021-07-09 18:17:26,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795548019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129182807] [2021-07-09 18:17:26,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:27,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:27,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:27,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:27,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:27,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:17:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129182807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:27,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:27,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 18:17:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083571029] [2021-07-09 18:17:27,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:27,396 INFO L87 Difference]: Start difference. First operand 906 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:27,522 INFO L93 Difference]: Finished difference Result 1075 states and 4663 transitions. [2021-07-09 18:17:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:27,526 INFO L225 Difference]: With dead ends: 1075 [2021-07-09 18:17:27,526 INFO L226 Difference]: Without dead ends: 1071 [2021-07-09 18:17:27,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-07-09 18:17:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-07-09 18:17:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 4.752269779507134) internal successors, (3664), 771 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-07-09 18:17:27,546 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-07-09 18:17:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:27,546 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-07-09 18:17:27,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-07-09 18:17:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:27,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:27,549 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:27,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:27,765 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:27,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-07-09 18:17:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:27,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564680162] [2021-07-09 18:17:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:27,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564680162] [2021-07-09 18:17:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564680162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124819270] [2021-07-09 18:17:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:27,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:17:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:28,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124819270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:28,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:28,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:17:28,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787964920] [2021-07-09 18:17:28,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:28,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:28,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:28,188 INFO L87 Difference]: Start difference. First operand 772 states and 3664 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:28,288 INFO L93 Difference]: Finished difference Result 833 states and 3832 transitions. [2021-07-09 18:17:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:28,290 INFO L225 Difference]: With dead ends: 833 [2021-07-09 18:17:28,290 INFO L226 Difference]: Without dead ends: 827 [2021-07-09 18:17:28,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-07-09 18:17:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-07-09 18:17:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.745148771021992) internal successors, (3668), 773 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-07-09 18:17:28,308 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-07-09 18:17:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:28,308 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-07-09 18:17:28,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-07-09 18:17:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:28,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:28,310 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:28,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:28,525 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-07-09 18:17:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696211491] [2021-07-09 18:17:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:28,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696211491] [2021-07-09 18:17:28,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696211491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:28,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748194863] [2021-07-09 18:17:28,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:28,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:29,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748194863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:29,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:29,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:17:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382614830] [2021-07-09 18:17:29,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:29,074 INFO L87 Difference]: Start difference. First operand 774 states and 3668 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:29,236 INFO L93 Difference]: Finished difference Result 830 states and 3817 transitions. [2021-07-09 18:17:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:29,238 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:17:29,238 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 18:17:29,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 18:17:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-07-09 18:17:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 4.736774193548387) internal successors, (3671), 775 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-07-09 18:17:29,253 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-07-09 18:17:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:29,253 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-07-09 18:17:29,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-07-09 18:17:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:29,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:29,256 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:29,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:29,469 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-07-09 18:17:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718474991] [2021-07-09 18:17:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:17:29,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:29,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718474991] [2021-07-09 18:17:29,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718474991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:29,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583594195] [2021-07-09 18:17:29,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:29,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583594195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:29,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:29,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 18:17:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744698334] [2021-07-09 18:17:29,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:29,907 INFO L87 Difference]: Start difference. First operand 776 states and 3671 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:30,088 INFO L93 Difference]: Finished difference Result 941 states and 4147 transitions. [2021-07-09 18:17:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:30,091 INFO L225 Difference]: With dead ends: 941 [2021-07-09 18:17:30,091 INFO L226 Difference]: Without dead ends: 923 [2021-07-09 18:17:30,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-09 18:17:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-07-09 18:17:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.699481865284974) internal successors, (3628), 772 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-07-09 18:17:30,107 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-07-09 18:17:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:30,107 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-07-09 18:17:30,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-07-09 18:17:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:30,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:30,109 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:30,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:30,333 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-07-09 18:17:30,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:30,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680598458] [2021-07-09 18:17:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:30,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:30,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680598458] [2021-07-09 18:17:30,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680598458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:30,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302485774] [2021-07-09 18:17:30,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:30,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:17:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302485774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:30,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:30,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:17:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368442539] [2021-07-09 18:17:30,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:30,987 INFO L87 Difference]: Start difference. First operand 773 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:31,239 INFO L93 Difference]: Finished difference Result 828 states and 3794 transitions. [2021-07-09 18:17:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:31,242 INFO L225 Difference]: With dead ends: 828 [2021-07-09 18:17:31,242 INFO L226 Difference]: Without dead ends: 825 [2021-07-09 18:17:31,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-09 18:17:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-07-09 18:17:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 4.694587628865979) internal successors, (3643), 776 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-07-09 18:17:31,261 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-07-09 18:17:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:31,261 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-07-09 18:17:31,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-07-09 18:17:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:31,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:31,263 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:31,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:17:31,487 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-07-09 18:17:31,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:31,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009165265] [2021-07-09 18:17:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:31,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009165265] [2021-07-09 18:17:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009165265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152811312] [2021-07-09 18:17:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:31,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:31,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:31,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:31,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:31,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:31,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:31,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:17:31,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-07-09 18:17:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:17:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152811312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:31,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:31,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 18:17:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490368459] [2021-07-09 18:17:31,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:31,794 INFO L87 Difference]: Start difference. First operand 777 states and 3643 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:32,236 INFO L93 Difference]: Finished difference Result 867 states and 3843 transitions. [2021-07-09 18:17:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:17:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:32,239 INFO L225 Difference]: With dead ends: 867 [2021-07-09 18:17:32,239 INFO L226 Difference]: Without dead ends: 861 [2021-07-09 18:17:32,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-09 18:17:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-07-09 18:17:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.66010498687664) internal successors, (3551), 762 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-07-09 18:17:32,271 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-07-09 18:17:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:32,271 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-07-09 18:17:32,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-07-09 18:17:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:32,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:32,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:32,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:32,496 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-07-09 18:17:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759960056] [2021-07-09 18:17:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:32,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759960056] [2021-07-09 18:17:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759960056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976359539] [2021-07-09 18:17:32,593 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:17:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:32,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:32,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:32,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:32,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:32,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-07-09 18:17:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:32,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976359539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:32,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:32,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:17:32,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937889552] [2021-07-09 18:17:32,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:32,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:32,865 INFO L87 Difference]: Start difference. First operand 763 states and 3551 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:33,149 INFO L93 Difference]: Finished difference Result 2342 states and 10200 transitions. [2021-07-09 18:17:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:33,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:33,157 INFO L225 Difference]: With dead ends: 2342 [2021-07-09 18:17:33,157 INFO L226 Difference]: Without dead ends: 2230 [2021-07-09 18:17:33,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-09 18:17:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-07-09 18:17:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.92466296590008) internal successors, (6210), 1261 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-07-09 18:17:33,203 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-07-09 18:17:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:33,203 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-07-09 18:17:33,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-07-09 18:17:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:33,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:33,207 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:33,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:33,430 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:33,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-07-09 18:17:33,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:33,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526193049] [2021-07-09 18:17:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:33,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:33,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526193049] [2021-07-09 18:17:33,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526193049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:33,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468385341] [2021-07-09 18:17:33,657 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:33,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:34,133 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-07-09 18:17:34,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:34,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:17:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:34,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468385341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:34,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:34,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:34,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729730892] [2021-07-09 18:17:34,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:34,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:34,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:34,289 INFO L87 Difference]: Start difference. First operand 1262 states and 6210 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:34,847 INFO L93 Difference]: Finished difference Result 1627 states and 7436 transitions. [2021-07-09 18:17:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:17:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:34,851 INFO L225 Difference]: With dead ends: 1627 [2021-07-09 18:17:34,851 INFO L226 Difference]: Without dead ends: 1589 [2021-07-09 18:17:34,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-09 18:17:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-07-09 18:17:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.918667699457784) internal successors, (6350), 1291 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-07-09 18:17:34,877 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-07-09 18:17:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:34,878 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-07-09 18:17:34,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-07-09 18:17:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:34,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:34,882 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:35,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:17:35,100 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-07-09 18:17:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:35,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651966136] [2021-07-09 18:17:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:35,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:35,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651966136] [2021-07-09 18:17:35,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651966136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:35,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247935265] [2021-07-09 18:17:35,246 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:35,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:35,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:35,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:35,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:35,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:35,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-09 18:17:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247935265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:35,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:35,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:35,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490435284] [2021-07-09 18:17:35,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:35,606 INFO L87 Difference]: Start difference. First operand 1292 states and 6350 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:35,920 INFO L93 Difference]: Finished difference Result 2364 states and 10664 transitions. [2021-07-09 18:17:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:17:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:35,926 INFO L225 Difference]: With dead ends: 2364 [2021-07-09 18:17:35,926 INFO L226 Difference]: Without dead ends: 2284 [2021-07-09 18:17:35,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-07-09 18:17:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-07-09 18:17:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 5.044398907103825) internal successors, (7385), 1464 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-07-09 18:17:35,961 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-07-09 18:17:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:35,961 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-07-09 18:17:35,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-07-09 18:17:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:35,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:35,966 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:36,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:17:36,181 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-07-09 18:17:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879581950] [2021-07-09 18:17:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:36,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:36,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879581950] [2021-07-09 18:17:36,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879581950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104253137] [2021-07-09 18:17:36,276 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:36,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:17:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:36,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:36,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-07-09 18:17:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:36,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104253137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:36,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-09 18:17:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332940099] [2021-07-09 18:17:36,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:36,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:36,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:36,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:36,488 INFO L87 Difference]: Start difference. First operand 1465 states and 7385 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:36,737 INFO L93 Difference]: Finished difference Result 2052 states and 9700 transitions. [2021-07-09 18:17:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:36,743 INFO L225 Difference]: With dead ends: 2052 [2021-07-09 18:17:36,743 INFO L226 Difference]: Without dead ends: 2019 [2021-07-09 18:17:36,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-07-09 18:17:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-07-09 18:17:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 5.078964830789649) internal successors, (7654), 1507 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-07-09 18:17:36,770 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-07-09 18:17:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:36,770 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-07-09 18:17:36,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-07-09 18:17:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:36,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:36,774 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:36,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:17:36,974 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-07-09 18:17:36,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:36,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004882979] [2021-07-09 18:17:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:37,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004882979] [2021-07-09 18:17:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004882979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189348390] [2021-07-09 18:17:37,045 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:37,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:37,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:37,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189348390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:37,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:17:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699570770] [2021-07-09 18:17:37,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:37,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:37,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:37,337 INFO L87 Difference]: Start difference. First operand 1508 states and 7654 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:37,513 INFO L93 Difference]: Finished difference Result 2203 states and 10357 transitions. [2021-07-09 18:17:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:17:37,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:37,519 INFO L225 Difference]: With dead ends: 2203 [2021-07-09 18:17:37,519 INFO L226 Difference]: Without dead ends: 2160 [2021-07-09 18:17:37,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-07-09 18:17:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-07-09 18:17:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 5.1066302118933695) internal successors, (7471), 1463 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-07-09 18:17:37,549 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-07-09 18:17:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:37,549 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-07-09 18:17:37,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-07-09 18:17:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:37,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:37,552 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:37,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:37,754 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-07-09 18:17:37,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:37,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128979623] [2021-07-09 18:17:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:37,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:37,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128979623] [2021-07-09 18:17:37,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128979623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458010780] [2021-07-09 18:17:37,889 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:37,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:37,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:37,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:38,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458010780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:38,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:38,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:38,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036981774] [2021-07-09 18:17:38,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:38,288 INFO L87 Difference]: Start difference. First operand 1464 states and 7471 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:38,581 INFO L93 Difference]: Finished difference Result 1548 states and 7764 transitions. [2021-07-09 18:17:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:38,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:38,586 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:17:38,586 INFO L226 Difference]: Without dead ends: 1536 [2021-07-09 18:17:38,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-07-09 18:17:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-07-09 18:17:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 5.104548540393754) internal successors, (7519), 1473 states have internal predecessors, (7519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-07-09 18:17:38,611 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-07-09 18:17:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:38,611 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-07-09 18:17:38,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-07-09 18:17:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:38,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:38,614 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:38,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:17:38,815 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-07-09 18:17:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:38,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141159780] [2021-07-09 18:17:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141159780] [2021-07-09 18:17:39,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141159780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944090877] [2021-07-09 18:17:39,009 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:39,374 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:17:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944090877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:39,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:39,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178983939] [2021-07-09 18:17:39,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:39,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:39,487 INFO L87 Difference]: Start difference. First operand 1474 states and 7519 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:39,847 INFO L93 Difference]: Finished difference Result 1546 states and 7729 transitions. [2021-07-09 18:17:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:39,851 INFO L225 Difference]: With dead ends: 1546 [2021-07-09 18:17:39,851 INFO L226 Difference]: Without dead ends: 1534 [2021-07-09 18:17:39,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-07-09 18:17:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-07-09 18:17:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 5.102581521739131) internal successors, (7511), 1472 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-07-09 18:17:39,875 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-07-09 18:17:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:39,875 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-07-09 18:17:39,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-07-09 18:17:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:39,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:39,878 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:40,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:17:40,079 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:40,079 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-07-09 18:17:40,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:40,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868699513] [2021-07-09 18:17:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868699513] [2021-07-09 18:17:40,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868699513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50670321] [2021-07-09 18:17:40,199 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:40,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:40,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50670321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:40,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885401458] [2021-07-09 18:17:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:40,504 INFO L87 Difference]: Start difference. First operand 1473 states and 7511 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:40,665 INFO L93 Difference]: Finished difference Result 1593 states and 7901 transitions. [2021-07-09 18:17:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:40,669 INFO L225 Difference]: With dead ends: 1593 [2021-07-09 18:17:40,669 INFO L226 Difference]: Without dead ends: 1586 [2021-07-09 18:17:40,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-07-09 18:17:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-07-09 18:17:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 5.092991913746631) internal successors, (7558), 1484 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-07-09 18:17:40,694 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-07-09 18:17:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:40,694 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-07-09 18:17:40,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-07-09 18:17:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:40,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:40,697 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:40,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:40,898 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-07-09 18:17:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:40,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470904188] [2021-07-09 18:17:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:41,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470904188] [2021-07-09 18:17:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470904188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136571398] [2021-07-09 18:17:41,035 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:41,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:17:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136571398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:41,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:41,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149804871] [2021-07-09 18:17:41,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:41,386 INFO L87 Difference]: Start difference. First operand 1485 states and 7558 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:41,587 INFO L93 Difference]: Finished difference Result 1522 states and 7682 transitions. [2021-07-09 18:17:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:41,592 INFO L225 Difference]: With dead ends: 1522 [2021-07-09 18:17:41,593 INFO L226 Difference]: Without dead ends: 1517 [2021-07-09 18:17:41,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-07-09 18:17:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-07-09 18:17:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.088156123822342) internal successors, (7561), 1486 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-07-09 18:17:41,621 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-07-09 18:17:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:41,621 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-07-09 18:17:41,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-07-09 18:17:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:41,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:41,624 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:41,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:17:41,825 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-07-09 18:17:41,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:41,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012846722] [2021-07-09 18:17:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:41,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:41,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012846722] [2021-07-09 18:17:41,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012846722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:41,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456701908] [2021-07-09 18:17:41,974 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:42,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456701908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:42,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:42,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954943474] [2021-07-09 18:17:42,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:42,396 INFO L87 Difference]: Start difference. First operand 1487 states and 7561 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:42,622 INFO L93 Difference]: Finished difference Result 1542 states and 7723 transitions. [2021-07-09 18:17:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:42,626 INFO L225 Difference]: With dead ends: 1542 [2021-07-09 18:17:42,626 INFO L226 Difference]: Without dead ends: 1535 [2021-07-09 18:17:42,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-09 18:17:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-07-09 18:17:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.090847913862719) internal successors, (7565), 1486 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-07-09 18:17:42,650 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-07-09 18:17:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:42,650 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-07-09 18:17:42,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-07-09 18:17:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:42,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:42,653 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:42,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:17:42,854 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-07-09 18:17:42,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:42,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859723364] [2021-07-09 18:17:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859723364] [2021-07-09 18:17:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859723364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644654684] [2021-07-09 18:17:43,033 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:43,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:43,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:43,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:43,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:43,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:43,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:17:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644654684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:43,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:43,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445098284] [2021-07-09 18:17:43,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:43,375 INFO L87 Difference]: Start difference. First operand 1487 states and 7565 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:43,675 INFO L93 Difference]: Finished difference Result 2082 states and 9859 transitions. [2021-07-09 18:17:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:17:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:43,681 INFO L225 Difference]: With dead ends: 2082 [2021-07-09 18:17:43,681 INFO L226 Difference]: Without dead ends: 2041 [2021-07-09 18:17:43,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-09 18:17:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-07-09 18:17:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 5.153279785809906) internal successors, (7699), 1494 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-07-09 18:17:43,718 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-07-09 18:17:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:43,718 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-07-09 18:17:43,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-07-09 18:17:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:43,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:43,723 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:43,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:17:43,941 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-07-09 18:17:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:43,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832036712] [2021-07-09 18:17:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832036712] [2021-07-09 18:17:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832036712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290038768] [2021-07-09 18:17:44,120 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:44,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:44,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290038768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:44,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:44,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653703767] [2021-07-09 18:17:44,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:44,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:44,577 INFO L87 Difference]: Start difference. First operand 1495 states and 7699 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:45,045 INFO L93 Difference]: Finished difference Result 1873 states and 8862 transitions. [2021-07-09 18:17:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:17:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:45,050 INFO L225 Difference]: With dead ends: 1873 [2021-07-09 18:17:45,050 INFO L226 Difference]: Without dead ends: 1829 [2021-07-09 18:17:45,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:17:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-09 18:17:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-07-09 18:17:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 5.063758389261745) internal successors, (7545), 1490 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-07-09 18:17:45,079 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-07-09 18:17:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:45,079 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-07-09 18:17:45,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-07-09 18:17:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:45,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:45,084 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:45,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 18:17:45,297 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-07-09 18:17:45,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:45,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454299363] [2021-07-09 18:17:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:45,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:45,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454299363] [2021-07-09 18:17:45,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454299363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:45,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191248226] [2021-07-09 18:17:45,415 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:17:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:45,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191248226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:45,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:45,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:45,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299328622] [2021-07-09 18:17:45,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:45,826 INFO L87 Difference]: Start difference. First operand 1491 states and 7545 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:46,043 INFO L93 Difference]: Finished difference Result 1562 states and 7790 transitions. [2021-07-09 18:17:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:46,047 INFO L225 Difference]: With dead ends: 1562 [2021-07-09 18:17:46,047 INFO L226 Difference]: Without dead ends: 1557 [2021-07-09 18:17:46,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 489.7ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-07-09 18:17:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-07-09 18:17:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 5.055444221776887) internal successors, (7568), 1497 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-07-09 18:17:46,079 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-07-09 18:17:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:46,079 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-07-09 18:17:46,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-07-09 18:17:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:46,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:46,083 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:46,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:46,304 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-07-09 18:17:46,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:46,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123526225] [2021-07-09 18:17:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123526225] [2021-07-09 18:17:46,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123526225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444256880] [2021-07-09 18:17:46,453 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:46,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444256880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:46,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:46,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923325425] [2021-07-09 18:17:46,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:46,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:46,879 INFO L87 Difference]: Start difference. First operand 1498 states and 7568 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:47,210 INFO L93 Difference]: Finished difference Result 1612 states and 7977 transitions. [2021-07-09 18:17:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:47,214 INFO L225 Difference]: With dead ends: 1612 [2021-07-09 18:17:47,214 INFO L226 Difference]: Without dead ends: 1607 [2021-07-09 18:17:47,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-09 18:17:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-07-09 18:17:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 5.058271935699933) internal successors, (7552), 1493 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-07-09 18:17:47,238 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-07-09 18:17:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:47,238 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-07-09 18:17:47,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-07-09 18:17:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:17:47,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:47,241 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:47,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 18:17:47,442 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-07-09 18:17:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:47,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883770832] [2021-07-09 18:17:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:47,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883770832] [2021-07-09 18:17:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883770832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85672872] [2021-07-09 18:17:47,596 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:47,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85672872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:17:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914267135] [2021-07-09 18:17:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:48,167 INFO L87 Difference]: Start difference. First operand 1494 states and 7552 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:48,421 INFO L93 Difference]: Finished difference Result 1565 states and 7788 transitions. [2021-07-09 18:17:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:17:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:48,425 INFO L225 Difference]: With dead ends: 1565 [2021-07-09 18:17:48,425 INFO L226 Difference]: Without dead ends: 1560 [2021-07-09 18:17:48,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-09 18:17:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-07-09 18:17:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 5.061032863849765) internal successors, (7546), 1491 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-07-09 18:17:48,455 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-07-09 18:17:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:48,456 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-07-09 18:17:48,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-07-09 18:17:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:48,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:48,460 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:48,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:48,660 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-07-09 18:17:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717461210] [2021-07-09 18:17:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:48,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717461210] [2021-07-09 18:17:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717461210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743560886] [2021-07-09 18:17:48,774 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:48,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:48,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:17:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:48,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:48,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:48,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:49,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:49,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:49,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:49,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:49,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:49,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:49,053 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-07-09 18:17:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:17:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743560886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:49,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:49,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-07-09 18:17:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76069749] [2021-07-09 18:17:49,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:49,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:49,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:49,152 INFO L87 Difference]: Start difference. First operand 1492 states and 7546 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:50,757 INFO L93 Difference]: Finished difference Result 1515 states and 6870 transitions. [2021-07-09 18:17:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:17:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:50,761 INFO L225 Difference]: With dead ends: 1515 [2021-07-09 18:17:50,761 INFO L226 Difference]: Without dead ends: 1464 [2021-07-09 18:17:50,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-09 18:17:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-07-09 18:17:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 4.833596214511041) internal successors, (6129), 1268 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-07-09 18:17:50,783 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-07-09 18:17:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:50,783 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-07-09 18:17:50,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-07-09 18:17:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:50,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:50,786 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:50,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:17:50,986 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-07-09 18:17:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:50,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071142999] [2021-07-09 18:17:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:17:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071142999] [2021-07-09 18:17:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071142999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604141042] [2021-07-09 18:17:51,061 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:51,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:51,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:51,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:51,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:51,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:51,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:51,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:51,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:51,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:51,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:51,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:51,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-07-09 18:17:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:17:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604141042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:51,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:51,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:17:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437767753] [2021-07-09 18:17:51,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:17:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:17:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:51,413 INFO L87 Difference]: Start difference. First operand 1269 states and 6129 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:51,622 INFO L93 Difference]: Finished difference Result 1808 states and 7860 transitions. [2021-07-09 18:17:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:17:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:17:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:51,626 INFO L225 Difference]: With dead ends: 1808 [2021-07-09 18:17:51,626 INFO L226 Difference]: Without dead ends: 1773 [2021-07-09 18:17:51,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-09 18:17:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-07-09 18:17:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 4.688552188552189) internal successors, (5570), 1188 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-07-09 18:17:51,650 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-07-09 18:17:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:51,650 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-07-09 18:17:51,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-07-09 18:17:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:51,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:51,653 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:51,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:51,857 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-07-09 18:17:51,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:51,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45800239] [2021-07-09 18:17:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:52,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45800239] [2021-07-09 18:17:52,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45800239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830428759] [2021-07-09 18:17:52,002 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:52,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830428759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:52,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:52,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:17:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362829869] [2021-07-09 18:17:52,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:52,657 INFO L87 Difference]: Start difference. First operand 1189 states and 5570 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:52,898 INFO L93 Difference]: Finished difference Result 1244 states and 5694 transitions. [2021-07-09 18:17:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:17:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:17:52,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:52,901 INFO L225 Difference]: With dead ends: 1244 [2021-07-09 18:17:52,901 INFO L226 Difference]: Without dead ends: 1230 [2021-07-09 18:17:52,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-09 18:17:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-07-09 18:17:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.66) internal successors, (5592), 1200 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-07-09 18:17:52,922 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-07-09 18:17:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:52,922 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-07-09 18:17:52,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-07-09 18:17:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:52,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:52,926 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:53,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:53,149 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-07-09 18:17:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:53,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275384076] [2021-07-09 18:17:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275384076] [2021-07-09 18:17:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275384076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740772049] [2021-07-09 18:17:53,264 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:53,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:17:53,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740772049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:53,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:53,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:17:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390066128] [2021-07-09 18:17:53,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:53,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:53,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:53,753 INFO L87 Difference]: Start difference. First operand 1201 states and 5592 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:53,881 INFO L93 Difference]: Finished difference Result 1221 states and 5632 transitions. [2021-07-09 18:17:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:17:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:17:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:53,885 INFO L225 Difference]: With dead ends: 1221 [2021-07-09 18:17:53,885 INFO L226 Difference]: Without dead ends: 1217 [2021-07-09 18:17:53,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-09 18:17:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-07-09 18:17:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.649501661129568) internal successors, (5598), 1204 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-07-09 18:17:53,902 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-07-09 18:17:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:53,903 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-07-09 18:17:53,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-07-09 18:17:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:53,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:53,905 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:54,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:17:54,106 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-07-09 18:17:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:54,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961598542] [2021-07-09 18:17:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:54,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961598542] [2021-07-09 18:17:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961598542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685826752] [2021-07-09 18:17:54,255 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:54,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:54,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:17:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:54,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:54,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:54,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:54,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:54,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:17:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685826752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:54,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:54,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:54,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530595420] [2021-07-09 18:17:54,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:54,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:54,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:54,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:54,717 INFO L87 Difference]: Start difference. First operand 1205 states and 5598 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:54,911 INFO L93 Difference]: Finished difference Result 1274 states and 5779 transitions. [2021-07-09 18:17:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:54,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:17:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:54,914 INFO L225 Difference]: With dead ends: 1274 [2021-07-09 18:17:54,914 INFO L226 Difference]: Without dead ends: 1261 [2021-07-09 18:17:54,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-09 18:17:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-07-09 18:17:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 4.650912106135987) internal successors, (5609), 1206 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-07-09 18:17:54,948 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-07-09 18:17:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:54,948 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-07-09 18:17:54,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-07-09 18:17:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:54,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:54,950 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:55,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-09 18:17:55,151 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-07-09 18:17:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:55,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104951694] [2021-07-09 18:17:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:55,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:55,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104951694] [2021-07-09 18:17:55,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104951694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:55,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216979173] [2021-07-09 18:17:55,263 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:17:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:55,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216979173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:55,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:55,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:17:55,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051901663] [2021-07-09 18:17:55,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:55,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:55,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:55,881 INFO L87 Difference]: Start difference. First operand 1207 states and 5609 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:56,168 INFO L93 Difference]: Finished difference Result 1233 states and 5664 transitions. [2021-07-09 18:17:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:17:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:56,171 INFO L225 Difference]: With dead ends: 1233 [2021-07-09 18:17:56,171 INFO L226 Difference]: Without dead ends: 1225 [2021-07-09 18:17:56,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-09 18:17:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-07-09 18:17:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.646179401993355) internal successors, (5594), 1204 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-07-09 18:17:56,189 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-07-09 18:17:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:56,189 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-07-09 18:17:56,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-07-09 18:17:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:56,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:56,191 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:56,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:56,392 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-07-09 18:17:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:56,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137895877] [2021-07-09 18:17:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:56,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:56,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137895877] [2021-07-09 18:17:56,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137895877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:56,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572423705] [2021-07-09 18:17:56,521 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:56,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:17:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:56,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:56,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:56,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:56,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:56,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:17:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:56,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572423705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:56,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:56,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:56,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892045303] [2021-07-09 18:17:56,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:56,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:56,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:56,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:56,911 INFO L87 Difference]: Start difference. First operand 1205 states and 5594 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:57,258 INFO L93 Difference]: Finished difference Result 1253 states and 5719 transitions. [2021-07-09 18:17:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:17:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:57,261 INFO L225 Difference]: With dead ends: 1253 [2021-07-09 18:17:57,261 INFO L226 Difference]: Without dead ends: 1240 [2021-07-09 18:17:57,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:17:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-09 18:17:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-07-09 18:17:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.651666666666666) internal successors, (5582), 1200 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-07-09 18:17:57,280 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-07-09 18:17:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:57,280 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-07-09 18:17:57,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-07-09 18:17:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:57,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:57,282 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:57,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:57,483 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-07-09 18:17:57,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:57,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497488628] [2021-07-09 18:17:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:57,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497488628] [2021-07-09 18:17:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497488628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:57,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767454040] [2021-07-09 18:17:57,657 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:57,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:57,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:58,139 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-07-09 18:17:58,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:58,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:58,169 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-07-09 18:17:58,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-07-09 18:17:58,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:58,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-07-09 18:17:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767454040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:58,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:58,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:58,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605754243] [2021-07-09 18:17:58,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:58,218 INFO L87 Difference]: Start difference. First operand 1201 states and 5582 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:58,775 INFO L93 Difference]: Finished difference Result 1242 states and 5695 transitions. [2021-07-09 18:17:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-07-09 18:17:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:58,779 INFO L225 Difference]: With dead ends: 1242 [2021-07-09 18:17:58,779 INFO L226 Difference]: Without dead ends: 1227 [2021-07-09 18:17:58,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 857.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:17:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-09 18:17:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-07-09 18:17:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 4.6490066225165565) internal successors, (5616), 1208 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-07-09 18:17:58,806 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-07-09 18:17:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:58,806 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-07-09 18:17:58,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-07-09 18:17:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:58,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:58,810 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:59,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 18:17:59,033 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:59,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-07-09 18:17:59,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:59,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129962907] [2021-07-09 18:17:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:59,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129962907] [2021-07-09 18:17:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129962907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267325405] [2021-07-09 18:17:59,150 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:59,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:59,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:17:59,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:59,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:59,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:17:59,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:17:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:59,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267325405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:59,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:59,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-09 18:17:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348518484] [2021-07-09 18:17:59,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:59,491 INFO L87 Difference]: Start difference. First operand 1209 states and 5616 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:59,747 INFO L93 Difference]: Finished difference Result 1237 states and 5305 transitions. [2021-07-09 18:17:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:17:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:59,750 INFO L225 Difference]: With dead ends: 1237 [2021-07-09 18:17:59,750 INFO L226 Difference]: Without dead ends: 1213 [2021-07-09 18:17:59,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-07-09 18:17:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-07-09 18:17:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.60418648905804) internal successors, (4839), 1051 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-07-09 18:17:59,766 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-07-09 18:17:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:59,766 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-07-09 18:17:59,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-07-09 18:17:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:59,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:59,768 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:59,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,969 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-07-09 18:17:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686204305] [2021-07-09 18:17:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:00,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686204305] [2021-07-09 18:18:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686204305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517716121] [2021-07-09 18:18:00,109 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:00,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:18:00,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:00,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:00,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517716121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:00,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:00,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:00,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127738247] [2021-07-09 18:18:00,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:00,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:00,582 INFO L87 Difference]: Start difference. First operand 1052 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:00,801 INFO L93 Difference]: Finished difference Result 1096 states and 4937 transitions. [2021-07-09 18:18:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:00,803 INFO L225 Difference]: With dead ends: 1096 [2021-07-09 18:18:00,803 INFO L226 Difference]: Without dead ends: 1074 [2021-07-09 18:18:00,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-09 18:18:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-07-09 18:18:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.598665395614871) internal successors, (4824), 1049 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-07-09 18:18:00,820 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-07-09 18:18:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:00,820 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-07-09 18:18:00,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-07-09 18:18:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:00,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:00,822 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:01,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:01,023 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-07-09 18:18:01,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:01,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347717515] [2021-07-09 18:18:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:01,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347717515] [2021-07-09 18:18:01,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347717515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:01,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073679233] [2021-07-09 18:18:01,224 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:01,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:01,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:01,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:01,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:01,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:01,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:01,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-09 18:18:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:01,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073679233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:01,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:01,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137131980] [2021-07-09 18:18:01,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:01,604 INFO L87 Difference]: Start difference. First operand 1050 states and 4824 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:01,742 INFO L93 Difference]: Finished difference Result 1099 states and 4955 transitions. [2021-07-09 18:18:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:18:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:01,744 INFO L225 Difference]: With dead ends: 1099 [2021-07-09 18:18:01,744 INFO L226 Difference]: Without dead ends: 1086 [2021-07-09 18:18:01,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-09 18:18:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-07-09 18:18:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.604784688995215) internal successors, (4812), 1045 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-07-09 18:18:01,760 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-07-09 18:18:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:01,760 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-07-09 18:18:01,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-07-09 18:18:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:01,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:01,762 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:01,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 18:18:01,962 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-07-09 18:18:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8431404] [2021-07-09 18:18:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:02,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8431404] [2021-07-09 18:18:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8431404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025756591] [2021-07-09 18:18:02,181 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:02,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025756591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:02,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:02,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077934441] [2021-07-09 18:18:02,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:02,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:02,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:02,519 INFO L87 Difference]: Start difference. First operand 1046 states and 4812 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:02,774 INFO L93 Difference]: Finished difference Result 1140 states and 5064 transitions. [2021-07-09 18:18:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:02,777 INFO L225 Difference]: With dead ends: 1140 [2021-07-09 18:18:02,777 INFO L226 Difference]: Without dead ends: 1108 [2021-07-09 18:18:02,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-09 18:18:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-07-09 18:18:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 4.581285444234404) internal successors, (4847), 1058 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-07-09 18:18:02,793 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-07-09 18:18:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:02,793 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-07-09 18:18:02,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-07-09 18:18:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:02,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:02,796 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:02,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:02,997 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:02,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-07-09 18:18:02,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:02,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544792078] [2021-07-09 18:18:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:03,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544792078] [2021-07-09 18:18:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544792078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985685160] [2021-07-09 18:18:03,209 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:03,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:03,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:03,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:03,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:03,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:03,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:18:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:03,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985685160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:03,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:03,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125244787] [2021-07-09 18:18:03,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:03,606 INFO L87 Difference]: Start difference. First operand 1059 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:03,907 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-07-09 18:18:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:03,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-07-09 18:18:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:03,910 INFO L225 Difference]: With dead ends: 1101 [2021-07-09 18:18:03,910 INFO L226 Difference]: Without dead ends: 1086 [2021-07-09 18:18:03,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:18:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-09 18:18:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-07-09 18:18:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.583018867924529) internal successors, (4858), 1060 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-07-09 18:18:03,926 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-07-09 18:18:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:03,926 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-07-09 18:18:03,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-07-09 18:18:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:03,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:03,928 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:04,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:04,129 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-07-09 18:18:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:04,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079174023] [2021-07-09 18:18:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:04,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079174023] [2021-07-09 18:18:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079174023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338031392] [2021-07-09 18:18:04,300 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:04,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:18:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:04,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338031392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:04,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:04,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157879555] [2021-07-09 18:18:04,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:04,743 INFO L87 Difference]: Start difference. First operand 1061 states and 4858 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:04,977 INFO L93 Difference]: Finished difference Result 1142 states and 5070 transitions. [2021-07-09 18:18:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:04,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:04,980 INFO L225 Difference]: With dead ends: 1142 [2021-07-09 18:18:04,980 INFO L226 Difference]: Without dead ends: 1110 [2021-07-09 18:18:04,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-07-09 18:18:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-07-09 18:18:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.6017191977077365) internal successors, (4818), 1047 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-07-09 18:18:04,996 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-07-09 18:18:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:04,996 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-07-09 18:18:04,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-07-09 18:18:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:04,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:04,998 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:05,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:05,212 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-07-09 18:18:05,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:05,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58299654] [2021-07-09 18:18:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:05,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:05,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58299654] [2021-07-09 18:18:05,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58299654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:05,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491937611] [2021-07-09 18:18:05,388 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:05,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:05,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491937611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:05,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:05,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-07-09 18:18:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426772780] [2021-07-09 18:18:05,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:05,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:05,927 INFO L87 Difference]: Start difference. First operand 1048 states and 4818 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-07-09 18:18:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:06,399 INFO L93 Difference]: Finished difference Result 1070 states and 4863 transitions. [2021-07-09 18:18:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 [2021-07-09 18:18:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:06,401 INFO L225 Difference]: With dead ends: 1070 [2021-07-09 18:18:06,401 INFO L226 Difference]: Without dead ends: 1066 [2021-07-09 18:18:06,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 878.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-09 18:18:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-07-09 18:18:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.5978987583572115) internal successors, (4814), 1047 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-07-09 18:18:06,417 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-07-09 18:18:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:06,417 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-07-09 18:18:06,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-07-09 18:18:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-07-09 18:18:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:06,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:06,419 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:06,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:06,621 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-07-09 18:18:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:06,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166962082] [2021-07-09 18:18:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:06,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166962082] [2021-07-09 18:18:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166962082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835756104] [2021-07-09 18:18:06,790 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:06,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:06,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:06,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:07,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:07,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:07,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:07,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:18:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:07,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835756104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:07,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:07,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:07,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009365310] [2021-07-09 18:18:07,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:07,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:07,228 INFO L87 Difference]: Start difference. First operand 1048 states and 4814 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:07,467 INFO L93 Difference]: Finished difference Result 1107 states and 4970 transitions. [2021-07-09 18:18:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-07-09 18:18:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:07,470 INFO L225 Difference]: With dead ends: 1107 [2021-07-09 18:18:07,470 INFO L226 Difference]: Without dead ends: 1092 [2021-07-09 18:18:07,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-07-09 18:18:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-07-09 18:18:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.599618684461392) internal successors, (4825), 1049 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-07-09 18:18:07,486 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-07-09 18:18:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:07,486 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-07-09 18:18:07,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-07-09 18:18:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:07,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:07,488 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:07,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:07,689 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-07-09 18:18:07,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:07,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050342121] [2021-07-09 18:18:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:07,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:07,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050342121] [2021-07-09 18:18:07,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050342121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:07,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612846504] [2021-07-09 18:18:07,828 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:07,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:18:07,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:08,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612846504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:08,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:08,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:08,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134086048] [2021-07-09 18:18:08,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:08,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:08,309 INFO L87 Difference]: Start difference. First operand 1050 states and 4825 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:08,668 INFO L93 Difference]: Finished difference Result 1072 states and 4870 transitions. [2021-07-09 18:18:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:08,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:18:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:08,670 INFO L225 Difference]: With dead ends: 1072 [2021-07-09 18:18:08,670 INFO L226 Difference]: Without dead ends: 1064 [2021-07-09 18:18:08,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-09 18:18:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-07-09 18:18:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.598086124401914) internal successors, (4805), 1045 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-07-09 18:18:08,688 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-07-09 18:18:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-07-09 18:18:08,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-07-09 18:18:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:08,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:08,690 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:08,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-09 18:18:08,891 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:08,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-07-09 18:18:08,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:08,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618676744] [2021-07-09 18:18:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:09,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618676744] [2021-07-09 18:18:09,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618676744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293029851] [2021-07-09 18:18:09,027 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:09,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293029851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:09,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:09,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912791133] [2021-07-09 18:18:09,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:09,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:09,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:09,626 INFO L87 Difference]: Start difference. First operand 1046 states and 4805 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:09,984 INFO L93 Difference]: Finished difference Result 1067 states and 4747 transitions. [2021-07-09 18:18:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:09,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:09,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:09,987 INFO L225 Difference]: With dead ends: 1067 [2021-07-09 18:18:09,987 INFO L226 Difference]: Without dead ends: 1049 [2021-07-09 18:18:09,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-07-09 18:18:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-07-09 18:18:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 4.565476190476191) internal successors, (4602), 1008 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-07-09 18:18:10,002 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-07-09 18:18:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:10,002 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-07-09 18:18:10,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-07-09 18:18:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:10,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:10,004 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:10,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:10,204 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-07-09 18:18:10,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:10,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573370678] [2021-07-09 18:18:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:10,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573370678] [2021-07-09 18:18:10,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573370678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906525706] [2021-07-09 18:18:10,312 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:10,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:10,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:18:10,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:10,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:10,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:10,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:10,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:18:10,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-07-09 18:18:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906525706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:10,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:18:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322872380] [2021-07-09 18:18:10,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:18:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:18:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:18:10,627 INFO L87 Difference]: Start difference. First operand 1009 states and 4602 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:10,906 INFO L93 Difference]: Finished difference Result 1207 states and 4868 transitions. [2021-07-09 18:18:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-07-09 18:18:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:10,909 INFO L225 Difference]: With dead ends: 1207 [2021-07-09 18:18:10,909 INFO L226 Difference]: Without dead ends: 1179 [2021-07-09 18:18:10,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-09 18:18:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-07-09 18:18:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 4.41991341991342) internal successors, (4084), 924 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-07-09 18:18:10,923 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-07-09 18:18:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-07-09 18:18:10,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-07-09 18:18:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:10,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:10,925 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:11,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:18:11,126 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:11,126 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-07-09 18:18:11,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:11,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296455055] [2021-07-09 18:18:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:11,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:11,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296455055] [2021-07-09 18:18:11,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296455055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:11,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308410315] [2021-07-09 18:18:11,262 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:11,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308410315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:11,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:11,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:11,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418040031] [2021-07-09 18:18:11,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:11,783 INFO L87 Difference]: Start difference. First operand 925 states and 4084 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:12,264 INFO L93 Difference]: Finished difference Result 955 states and 4153 transitions. [2021-07-09 18:18:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:12,267 INFO L225 Difference]: With dead ends: 955 [2021-07-09 18:18:12,267 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:18:12,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:18:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-07-09 18:18:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 4.411447084233261) internal successors, (4085), 926 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-07-09 18:18:12,279 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-07-09 18:18:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:12,279 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-07-09 18:18:12,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-07-09 18:18:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:12,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:12,281 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:12,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-09 18:18:12,482 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-07-09 18:18:12,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:12,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663614785] [2021-07-09 18:18:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:12,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:12,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663614785] [2021-07-09 18:18:12,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663614785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:12,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439869051] [2021-07-09 18:18:12,664 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:12,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:12,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:13,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:13,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:13,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:13,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:13,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:18:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439869051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:13,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371426460] [2021-07-09 18:18:13,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:13,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:13,136 INFO L87 Difference]: Start difference. First operand 927 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:13,623 INFO L93 Difference]: Finished difference Result 1002 states and 4289 transitions. [2021-07-09 18:18:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:18:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:13,626 INFO L225 Difference]: With dead ends: 1002 [2021-07-09 18:18:13,626 INFO L226 Difference]: Without dead ends: 989 [2021-07-09 18:18:13,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 804.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-07-09 18:18:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-07-09 18:18:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 4.411827956989248) internal successors, (4103), 930 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-07-09 18:18:13,638 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-07-09 18:18:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:13,638 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-07-09 18:18:13,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-07-09 18:18:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:13,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:13,639 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:13,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-09 18:18:13,840 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-07-09 18:18:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146521993] [2021-07-09 18:18:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:13,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146521993] [2021-07-09 18:18:13,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146521993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683136718] [2021-07-09 18:18:13,950 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:13,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683136718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:14,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:14,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:14,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686047406] [2021-07-09 18:18:14,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:14,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:14,423 INFO L87 Difference]: Start difference. First operand 931 states and 4103 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:14,551 INFO L93 Difference]: Finished difference Result 963 states and 4175 transitions. [2021-07-09 18:18:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:14,553 INFO L225 Difference]: With dead ends: 963 [2021-07-09 18:18:14,553 INFO L226 Difference]: Without dead ends: 955 [2021-07-09 18:18:14,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-09 18:18:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-07-09 18:18:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 4.405172413793103) internal successors, (4088), 928 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-07-09 18:18:14,566 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-07-09 18:18:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:14,567 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-07-09 18:18:14,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-07-09 18:18:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:14,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:14,568 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:14,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 18:18:14,770 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-07-09 18:18:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:14,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142694621] [2021-07-09 18:18:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:14,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:14,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142694621] [2021-07-09 18:18:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142694621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:14,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071906536] [2021-07-09 18:18:14,900 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:14,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:14,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:15,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:15,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:15,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:18:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071906536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:15,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152562577] [2021-07-09 18:18:15,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:15,284 INFO L87 Difference]: Start difference. First operand 929 states and 4088 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:15,460 INFO L93 Difference]: Finished difference Result 978 states and 4219 transitions. [2021-07-09 18:18:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:18:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:15,462 INFO L225 Difference]: With dead ends: 978 [2021-07-09 18:18:15,463 INFO L226 Difference]: Without dead ends: 965 [2021-07-09 18:18:15,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-09 18:18:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-07-09 18:18:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 4.417391304347826) internal successors, (4064), 920 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-07-09 18:18:15,476 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-07-09 18:18:15,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:15,476 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-07-09 18:18:15,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-07-09 18:18:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:15,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:15,478 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:15,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:15,678 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-07-09 18:18:15,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:15,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12838642] [2021-07-09 18:18:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:15,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12838642] [2021-07-09 18:18:15,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12838642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107114993] [2021-07-09 18:18:15,815 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:16,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:16,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:16,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:16,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-07-09 18:18:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107114993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:16,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:16,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641422460] [2021-07-09 18:18:16,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:16,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:16,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:16,149 INFO L87 Difference]: Start difference. First operand 921 states and 4064 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:16,412 INFO L93 Difference]: Finished difference Result 962 states and 4159 transitions. [2021-07-09 18:18:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-07-09 18:18:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:16,414 INFO L225 Difference]: With dead ends: 962 [2021-07-09 18:18:16,414 INFO L226 Difference]: Without dead ends: 947 [2021-07-09 18:18:16,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-09 18:18:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-07-09 18:18:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 4.415032679738562) internal successors, (4053), 918 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-07-09 18:18:16,429 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-07-09 18:18:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-07-09 18:18:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-07-09 18:18:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:16,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:16,431 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:16,631 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-07-09 18:18:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:16,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351165544] [2021-07-09 18:18:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:16,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351165544] [2021-07-09 18:18:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351165544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267431578] [2021-07-09 18:18:16,747 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:16,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:16,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:16,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267431578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:17,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:17,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:17,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304119005] [2021-07-09 18:18:17,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:17,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:17,142 INFO L87 Difference]: Start difference. First operand 919 states and 4053 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:17,541 INFO L93 Difference]: Finished difference Result 945 states and 4108 transitions. [2021-07-09 18:18:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:17,544 INFO L225 Difference]: With dead ends: 945 [2021-07-09 18:18:17,544 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 18:18:17,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 667.6ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 18:18:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-07-09 18:18:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 4.41703056768559) internal successors, (4046), 916 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-07-09 18:18:17,556 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-07-09 18:18:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:17,556 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-07-09 18:18:17,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-07-09 18:18:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:17,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:17,558 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:17,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 18:18:17,759 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-07-09 18:18:17,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:17,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365249682] [2021-07-09 18:18:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:17,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365249682] [2021-07-09 18:18:17,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365249682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:17,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329557325] [2021-07-09 18:18:17,913 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:17,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:18:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:18,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:18,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:18,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:18,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:18,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-07-09 18:18:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:18,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329557325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:18,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:18,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:18:18,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34295621] [2021-07-09 18:18:18,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:18:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:18:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:18:18,420 INFO L87 Difference]: Start difference. First operand 917 states and 4046 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:18,672 INFO L93 Difference]: Finished difference Result 1234 states and 5095 transitions. [2021-07-09 18:18:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:18:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-07-09 18:18:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:18,675 INFO L225 Difference]: With dead ends: 1234 [2021-07-09 18:18:18,675 INFO L226 Difference]: Without dead ends: 1207 [2021-07-09 18:18:18,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-07-09 18:18:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-07-09 18:18:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.458246346555324) internal successors, (4271), 958 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-07-09 18:18:18,693 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-07-09 18:18:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:18,694 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-07-09 18:18:18,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-07-09 18:18:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:18:18,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:18,696 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:18,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 18:18:18,898 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-07-09 18:18:18,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:18,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789435217] [2021-07-09 18:18:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:19,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:19,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789435217] [2021-07-09 18:18:19,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789435217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:19,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777668533] [2021-07-09 18:18:19,023 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:19,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777668533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:19,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:19,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:18:19,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732440652] [2021-07-09 18:18:19,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:18:19,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:18:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:19,549 INFO L87 Difference]: Start difference. First operand 959 states and 4271 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:19,933 INFO L93 Difference]: Finished difference Result 991 states and 4347 transitions. [2021-07-09 18:18:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:19,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-07-09 18:18:19,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:19,935 INFO L225 Difference]: With dead ends: 991 [2021-07-09 18:18:19,935 INFO L226 Difference]: Without dead ends: 987 [2021-07-09 18:18:19,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:18:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-07-09 18:18:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-07-09 18:18:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.449895615866389) internal successors, (4263), 958 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-07-09 18:18:19,948 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-07-09 18:18:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:19,949 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-07-09 18:18:19,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-07-09 18:18:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:19,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:19,950 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:20,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 18:18:20,151 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-07-09 18:18:20,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:20,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046070020] [2021-07-09 18:18:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:18:20,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046070020] [2021-07-09 18:18:20,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046070020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583307760] [2021-07-09 18:18:20,218 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:20,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:20,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:20,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:20,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:18:20,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:20,571 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-07-09 18:18:20,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:18:20,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-07-09 18:18:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:18:20,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583307760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:20,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:20,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 18:18:20,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455539998] [2021-07-09 18:18:20,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:18:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:18:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:18:20,619 INFO L87 Difference]: Start difference. First operand 959 states and 4263 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:20,726 INFO L93 Difference]: Finished difference Result 920 states and 3669 transitions. [2021-07-09 18:18:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:20,728 INFO L225 Difference]: With dead ends: 920 [2021-07-09 18:18:20,728 INFO L226 Difference]: Without dead ends: 892 [2021-07-09 18:18:20,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:18:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-07-09 18:18:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-07-09 18:18:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.2204724409448815) internal successors, (3216), 762 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-07-09 18:18:20,741 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-07-09 18:18:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:20,741 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-07-09 18:18:20,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-07-09 18:18:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:20,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:20,742 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:20,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:20,943 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-07-09 18:18:20,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:20,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446512489] [2021-07-09 18:18:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:21,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:21,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446512489] [2021-07-09 18:18:21,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446512489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:21,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614801823] [2021-07-09 18:18:21,021 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:21,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:18:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:21,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:21,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:21,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:21,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:21,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-07-09 18:18:22,014 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 18:18:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:22,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614801823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:22,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:22,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 18:18:22,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092361510] [2021-07-09 18:18:22,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:18:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:18:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:18:22,124 INFO L87 Difference]: Start difference. First operand 763 states and 3216 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:22,326 INFO L93 Difference]: Finished difference Result 1219 states and 4777 transitions. [2021-07-09 18:18:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:22,328 INFO L225 Difference]: With dead ends: 1219 [2021-07-09 18:18:22,328 INFO L226 Difference]: Without dead ends: 1159 [2021-07-09 18:18:22,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:18:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-09 18:18:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-07-09 18:18:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 4.203921568627451) internal successors, (3216), 765 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-07-09 18:18:22,353 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-07-09 18:18:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-07-09 18:18:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-07-09 18:18:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:22,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:22,355 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-09 18:18:22,557 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-07-09 18:18:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506920697] [2021-07-09 18:18:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:22,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506920697] [2021-07-09 18:18:22,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506920697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492473177] [2021-07-09 18:18:22,767 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:22,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:18:22,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:18:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:23,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492473177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:23,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:23,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698160950] [2021-07-09 18:18:23,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:23,198 INFO L87 Difference]: Start difference. First operand 766 states and 3216 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:23,497 INFO L93 Difference]: Finished difference Result 817 states and 3362 transitions. [2021-07-09 18:18:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:23,499 INFO L225 Difference]: With dead ends: 817 [2021-07-09 18:18:23,499 INFO L226 Difference]: Without dead ends: 808 [2021-07-09 18:18:23,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-07-09 18:18:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-07-09 18:18:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.186287192755498) internal successors, (3236), 773 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-07-09 18:18:23,509 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-07-09 18:18:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:23,509 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-07-09 18:18:23,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-07-09 18:18:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:23,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:23,511 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:23,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-09 18:18:23,711 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-07-09 18:18:23,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:23,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106488143] [2021-07-09 18:18:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:18:23,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:23,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106488143] [2021-07-09 18:18:23,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106488143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:23,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841679575] [2021-07-09 18:18:23,811 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:18:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:24,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:24,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:24,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:24,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:24,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:24,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-09 18:18:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:18:24,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841679575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:24,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:24,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-07-09 18:18:24,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117542680] [2021-07-09 18:18:24,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:18:24,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:24,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:18:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:18:24,241 INFO L87 Difference]: Start difference. First operand 774 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:24,497 INFO L93 Difference]: Finished difference Result 905 states and 3551 transitions. [2021-07-09 18:18:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:24,499 INFO L225 Difference]: With dead ends: 905 [2021-07-09 18:18:24,499 INFO L226 Difference]: Without dead ends: 865 [2021-07-09 18:18:24,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:18:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-07-09 18:18:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-07-09 18:18:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 4.175032175032175) internal successors, (3244), 777 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-07-09 18:18:24,510 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-07-09 18:18:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:24,510 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-07-09 18:18:24,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-07-09 18:18:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:24,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:24,511 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:24,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:24,714 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-07-09 18:18:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:24,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130748759] [2021-07-09 18:18:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:24,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:24,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130748759] [2021-07-09 18:18:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130748759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:24,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106673911] [2021-07-09 18:18:24,945 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:25,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106673911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:25,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:25,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504882970] [2021-07-09 18:18:25,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:25,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:25,571 INFO L87 Difference]: Start difference. First operand 778 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:25,995 INFO L93 Difference]: Finished difference Result 825 states and 3382 transitions. [2021-07-09 18:18:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:25,997 INFO L225 Difference]: With dead ends: 825 [2021-07-09 18:18:25,997 INFO L226 Difference]: Without dead ends: 816 [2021-07-09 18:18:25,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 893.8ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-07-09 18:18:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-07-09 18:18:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-07-09 18:18:26,008 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-07-09 18:18:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:26,009 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-07-09 18:18:26,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-07-09 18:18:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:26,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:26,010 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:26,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:26,211 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-07-09 18:18:26,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:26,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011741016] [2021-07-09 18:18:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:26,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011741016] [2021-07-09 18:18:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011741016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057121712] [2021-07-09 18:18:26,512 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:26,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057121712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:27,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:27,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598712570] [2021-07-09 18:18:27,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:27,277 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:27,747 INFO L93 Difference]: Finished difference Result 833 states and 3402 transitions. [2021-07-09 18:18:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:27,750 INFO L225 Difference]: With dead ends: 833 [2021-07-09 18:18:27,750 INFO L226 Difference]: Without dead ends: 824 [2021-07-09 18:18:27,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1098.0ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-09 18:18:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-07-09 18:18:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-07-09 18:18:27,761 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-07-09 18:18:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:27,761 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-07-09 18:18:27,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-07-09 18:18:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:27,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:27,762 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:27,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 18:18:27,963 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-07-09 18:18:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:27,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628251649] [2021-07-09 18:18:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:28,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:28,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628251649] [2021-07-09 18:18:28,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628251649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:28,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663121517] [2021-07-09 18:18:28,155 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:28,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663121517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:28,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:28,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497823573] [2021-07-09 18:18:28,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:28,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:28,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:28,540 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:28,789 INFO L93 Difference]: Finished difference Result 860 states and 3503 transitions. [2021-07-09 18:18:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:28,791 INFO L225 Difference]: With dead ends: 860 [2021-07-09 18:18:28,792 INFO L226 Difference]: Without dead ends: 846 [2021-07-09 18:18:28,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 550.0ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-07-09 18:18:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-07-09 18:18:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.139650872817955) internal successors, (3320), 802 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-07-09 18:18:28,803 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-07-09 18:18:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:28,804 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-07-09 18:18:28,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-07-09 18:18:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:28,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:28,805 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:29,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:29,006 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:29,006 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-07-09 18:18:29,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:29,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118973131] [2021-07-09 18:18:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:29,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:29,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118973131] [2021-07-09 18:18:29,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118973131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:29,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158619176] [2021-07-09 18:18:29,181 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:29,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:18:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:29,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158619176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:29,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:29,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:29,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157913587] [2021-07-09 18:18:29,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:29,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:29,736 INFO L87 Difference]: Start difference. First operand 803 states and 3320 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:29,893 INFO L93 Difference]: Finished difference Result 846 states and 3446 transitions. [2021-07-09 18:18:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:29,895 INFO L225 Difference]: With dead ends: 846 [2021-07-09 18:18:29,895 INFO L226 Difference]: Without dead ends: 837 [2021-07-09 18:18:29,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-07-09 18:18:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-07-09 18:18:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.145363408521304) internal successors, (3308), 798 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-07-09 18:18:29,906 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-07-09 18:18:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:29,906 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-07-09 18:18:29,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-07-09 18:18:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:29,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:29,907 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:30,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:30,108 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-07-09 18:18:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:30,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056909154] [2021-07-09 18:18:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:30,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056909154] [2021-07-09 18:18:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056909154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539713524] [2021-07-09 18:18:30,187 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:30,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:30,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:30,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:30,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:30,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:30,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:30,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:30,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-09 18:18:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539713524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:30,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:30,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 18:18:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847576704] [2021-07-09 18:18:30,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:18:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:18:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:18:30,677 INFO L87 Difference]: Start difference. First operand 799 states and 3308 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:30,942 INFO L93 Difference]: Finished difference Result 858 states and 3412 transitions. [2021-07-09 18:18:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:30,944 INFO L225 Difference]: With dead ends: 858 [2021-07-09 18:18:30,944 INFO L226 Difference]: Without dead ends: 826 [2021-07-09 18:18:30,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-09 18:18:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-07-09 18:18:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.111392405063291) internal successors, (3248), 790 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-07-09 18:18:30,955 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-07-09 18:18:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:30,955 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-07-09 18:18:30,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-07-09 18:18:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:30,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:30,956 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:31,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 18:18:31,157 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-07-09 18:18:31,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:31,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695179461] [2021-07-09 18:18:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:31,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:31,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695179461] [2021-07-09 18:18:31,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695179461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:31,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375448236] [2021-07-09 18:18:31,307 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:31,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:31,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375448236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:31,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:31,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858044829] [2021-07-09 18:18:31,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:31,854 INFO L87 Difference]: Start difference. First operand 791 states and 3248 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:32,127 INFO L93 Difference]: Finished difference Result 834 states and 3374 transitions. [2021-07-09 18:18:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:32,129 INFO L225 Difference]: With dead ends: 834 [2021-07-09 18:18:32,129 INFO L226 Difference]: Without dead ends: 825 [2021-07-09 18:18:32,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-09 18:18:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-07-09 18:18:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.103491271820449) internal successors, (3291), 802 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-07-09 18:18:32,141 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-07-09 18:18:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:32,141 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-07-09 18:18:32,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-07-09 18:18:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:32,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:32,142 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:32,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:32,349 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-07-09 18:18:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276312948] [2021-07-09 18:18:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276312948] [2021-07-09 18:18:32,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276312948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940326804] [2021-07-09 18:18:32,513 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:32,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:32,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:32,908 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:18:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940326804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:33,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:33,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580654240] [2021-07-09 18:18:33,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:33,073 INFO L87 Difference]: Start difference. First operand 803 states and 3291 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:33,351 INFO L93 Difference]: Finished difference Result 842 states and 3405 transitions. [2021-07-09 18:18:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:33,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:33,353 INFO L225 Difference]: With dead ends: 842 [2021-07-09 18:18:33,353 INFO L226 Difference]: Without dead ends: 833 [2021-07-09 18:18:33,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:18:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-07-09 18:18:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-07-09 18:18:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.109022556390977) internal successors, (3279), 798 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-07-09 18:18:33,364 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-07-09 18:18:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:33,365 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-07-09 18:18:33,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-07-09 18:18:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:33,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:33,366 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:33,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:33,567 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-07-09 18:18:33,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:33,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989359524] [2021-07-09 18:18:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:33,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:33,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989359524] [2021-07-09 18:18:33,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989359524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:33,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422022607] [2021-07-09 18:18:33,741 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:33,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:33,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:34,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422022607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502752152] [2021-07-09 18:18:34,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:34,258 INFO L87 Difference]: Start difference. First operand 799 states and 3279 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:34,612 INFO L93 Difference]: Finished difference Result 838 states and 3397 transitions. [2021-07-09 18:18:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:34,614 INFO L225 Difference]: With dead ends: 838 [2021-07-09 18:18:34,614 INFO L226 Difference]: Without dead ends: 829 [2021-07-09 18:18:34,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 727.3ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-07-09 18:18:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-07-09 18:18:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.125316455696202) internal successors, (3259), 790 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-07-09 18:18:34,632 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-07-09 18:18:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:34,632 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-07-09 18:18:34,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-07-09 18:18:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:34,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:34,633 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:34,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-09 18:18:34,834 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-07-09 18:18:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:34,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997020929] [2021-07-09 18:18:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:35,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:35,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997020929] [2021-07-09 18:18:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997020929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:35,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818130946] [2021-07-09 18:18:35,056 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:35,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:35,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:35,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:35,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818130946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:35,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:35,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:35,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091530961] [2021-07-09 18:18:35,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:35,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:35,503 INFO L87 Difference]: Start difference. First operand 791 states and 3259 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:35,749 INFO L93 Difference]: Finished difference Result 828 states and 3368 transitions. [2021-07-09 18:18:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:35,751 INFO L225 Difference]: With dead ends: 828 [2021-07-09 18:18:35,751 INFO L226 Difference]: Without dead ends: 819 [2021-07-09 18:18:35,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:18:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-07-09 18:18:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-07-09 18:18:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 4.135204081632653) internal successors, (3242), 784 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-07-09 18:18:35,762 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-07-09 18:18:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:35,762 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-07-09 18:18:35,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-07-09 18:18:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:35,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:35,764 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:35,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:35,964 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-07-09 18:18:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741539895] [2021-07-09 18:18:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741539895] [2021-07-09 18:18:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741539895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112257766] [2021-07-09 18:18:36,064 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:36,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:36,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:36,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:36,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:36,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:36,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:36,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:36,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-09 18:18:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112257766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:36,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:36,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:18:36,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180392763] [2021-07-09 18:18:36,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:18:36,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:18:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:18:36,613 INFO L87 Difference]: Start difference. First operand 785 states and 3242 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:37,673 INFO L93 Difference]: Finished difference Result 1456 states and 5972 transitions. [2021-07-09 18:18:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:37,677 INFO L225 Difference]: With dead ends: 1456 [2021-07-09 18:18:37,677 INFO L226 Difference]: Without dead ends: 1428 [2021-07-09 18:18:37,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-09 18:18:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-07-09 18:18:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 4.450592885375494) internal successors, (4504), 1012 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-07-09 18:18:37,702 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-07-09 18:18:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:37,702 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-07-09 18:18:37,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-07-09 18:18:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:37,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:37,704 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:37,928 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-07-09 18:18:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598002954] [2021-07-09 18:18:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:38,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598002954] [2021-07-09 18:18:38,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598002954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898579638] [2021-07-09 18:18:38,166 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:38,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:18:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:38,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:38,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:38,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898579638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:38,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:38,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:38,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550275348] [2021-07-09 18:18:38,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:38,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:38,673 INFO L87 Difference]: Start difference. First operand 1013 states and 4504 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:39,044 INFO L93 Difference]: Finished difference Result 1046 states and 4594 transitions. [2021-07-09 18:18:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:39,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:39,046 INFO L225 Difference]: With dead ends: 1046 [2021-07-09 18:18:39,046 INFO L226 Difference]: Without dead ends: 1037 [2021-07-09 18:18:39,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 738.9ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-09 18:18:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-07-09 18:18:39,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 4.439646712463199) internal successors, (4524), 1019 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-07-09 18:18:39,063 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-07-09 18:18:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:39,063 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-07-09 18:18:39,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-07-09 18:18:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:39,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:39,065 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:39,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-09 18:18:39,266 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-07-09 18:18:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:39,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31896314] [2021-07-09 18:18:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:39,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:39,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31896314] [2021-07-09 18:18:39,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31896314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:39,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044679295] [2021-07-09 18:18:39,403 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:39,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:39,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044679295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:39,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:39,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:39,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085423786] [2021-07-09 18:18:39,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:39,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:39,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:39,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:39,975 INFO L87 Difference]: Start difference. First operand 1020 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:40,394 INFO L93 Difference]: Finished difference Result 1059 states and 4642 transitions. [2021-07-09 18:18:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:40,397 INFO L225 Difference]: With dead ends: 1059 [2021-07-09 18:18:40,397 INFO L226 Difference]: Without dead ends: 1050 [2021-07-09 18:18:40,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-09 18:18:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-07-09 18:18:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 4.448140900195694) internal successors, (4546), 1022 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-07-09 18:18:40,411 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-07-09 18:18:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:40,411 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-07-09 18:18:40,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-07-09 18:18:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:40,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:40,413 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:40,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:40,614 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:40,614 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-07-09 18:18:40,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:40,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662695971] [2021-07-09 18:18:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662695971] [2021-07-09 18:18:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662695971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006161367] [2021-07-09 18:18:40,824 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:40,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:40,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:41,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006161367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:41,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:41,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:41,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829624360] [2021-07-09 18:18:41,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:41,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:41,461 INFO L87 Difference]: Start difference. First operand 1023 states and 4546 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:41,764 INFO L93 Difference]: Finished difference Result 1064 states and 4663 transitions. [2021-07-09 18:18:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:41,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:41,767 INFO L225 Difference]: With dead ends: 1064 [2021-07-09 18:18:41,767 INFO L226 Difference]: Without dead ends: 1055 [2021-07-09 18:18:41,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-09 18:18:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-07-09 18:18:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 4.457677165354331) internal successors, (4529), 1016 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-07-09 18:18:41,784 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-07-09 18:18:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:41,784 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-07-09 18:18:41,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-07-09 18:18:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:41,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:41,786 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:41,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:41,987 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-07-09 18:18:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:41,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429985638] [2021-07-09 18:18:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:42,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429985638] [2021-07-09 18:18:42,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429985638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837026987] [2021-07-09 18:18:42,159 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:42,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:18:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837026987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:42,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21462487] [2021-07-09 18:18:42,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:42,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:42,805 INFO L87 Difference]: Start difference. First operand 1017 states and 4529 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:43,343 INFO L93 Difference]: Finished difference Result 1054 states and 4614 transitions. [2021-07-09 18:18:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:43,345 INFO L225 Difference]: With dead ends: 1054 [2021-07-09 18:18:43,345 INFO L226 Difference]: Without dead ends: 1041 [2021-07-09 18:18:43,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1006.7ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:18:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-09 18:18:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-07-09 18:18:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 4.461386138613862) internal successors, (4506), 1010 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-07-09 18:18:43,359 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-07-09 18:18:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:43,359 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-07-09 18:18:43,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-07-09 18:18:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:43,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:43,361 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:43,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 18:18:43,562 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-07-09 18:18:43,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:43,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045002251] [2021-07-09 18:18:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:43,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:43,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045002251] [2021-07-09 18:18:43,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045002251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570303185] [2021-07-09 18:18:43,682 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:43,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:43,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:18:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:43,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:43,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:43,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:43,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:43,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-09 18:18:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570303185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:44,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:44,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-07-09 18:18:44,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586390344] [2021-07-09 18:18:44,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:18:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:18:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:18:44,038 INFO L87 Difference]: Start difference. First operand 1011 states and 4506 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:44,379 INFO L93 Difference]: Finished difference Result 1144 states and 4731 transitions. [2021-07-09 18:18:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:18:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:44,382 INFO L225 Difference]: With dead ends: 1144 [2021-07-09 18:18:44,382 INFO L226 Difference]: Without dead ends: 1094 [2021-07-09 18:18:44,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-09 18:18:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-07-09 18:18:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.441025641025641) internal successors, (4330), 975 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-07-09 18:18:44,407 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-07-09 18:18:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:44,407 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-07-09 18:18:44,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-07-09 18:18:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:44,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:44,409 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:44,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-09 18:18:44,609 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-07-09 18:18:44,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:44,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792447728] [2021-07-09 18:18:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:44,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:44,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792447728] [2021-07-09 18:18:44,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792447728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:44,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024935843] [2021-07-09 18:18:44,814 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:44,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:45,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024935843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:45,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:45,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:45,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111522275] [2021-07-09 18:18:45,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:45,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:45,397 INFO L87 Difference]: Start difference. First operand 976 states and 4330 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:45,919 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-07-09 18:18:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:45,922 INFO L225 Difference]: With dead ends: 1033 [2021-07-09 18:18:45,922 INFO L226 Difference]: Without dead ends: 1024 [2021-07-09 18:18:45,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:18:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-07-09 18:18:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-07-09 18:18:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 4.435137895812053) internal successors, (4342), 979 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-07-09 18:18:45,935 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-07-09 18:18:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:45,936 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-07-09 18:18:45,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-07-09 18:18:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:45,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:45,937 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:46,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-07-09 18:18:46,138 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-07-09 18:18:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:46,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425774753] [2021-07-09 18:18:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:46,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425774753] [2021-07-09 18:18:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425774753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:46,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201091002] [2021-07-09 18:18:46,291 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:46,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201091002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:46,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:46,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:46,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437073827] [2021-07-09 18:18:46,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:46,982 INFO L87 Difference]: Start difference. First operand 980 states and 4342 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:47,301 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-07-09 18:18:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:47,303 INFO L225 Difference]: With dead ends: 1033 [2021-07-09 18:18:47,303 INFO L226 Difference]: Without dead ends: 1024 [2021-07-09 18:18:47,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-07-09 18:18:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-07-09 18:18:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-07-09 18:18:47,324 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-07-09 18:18:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:47,324 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-07-09 18:18:47,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-07-09 18:18:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:47,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:47,327 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:47,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:47,551 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-07-09 18:18:47,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:47,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665488780] [2021-07-09 18:18:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:47,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665488780] [2021-07-09 18:18:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665488780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392467841] [2021-07-09 18:18:47,718 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:18:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:48,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392467841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:48,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:48,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:48,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591745908] [2021-07-09 18:18:48,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:48,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:48,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:48,123 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:48,471 INFO L93 Difference]: Finished difference Result 1017 states and 4451 transitions. [2021-07-09 18:18:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:48,474 INFO L225 Difference]: With dead ends: 1017 [2021-07-09 18:18:48,474 INFO L226 Difference]: Without dead ends: 1008 [2021-07-09 18:18:48,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-09 18:18:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-07-09 18:18:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-07-09 18:18:48,487 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-07-09 18:18:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:48,487 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-07-09 18:18:48,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-07-09 18:18:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:48,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:48,489 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:48,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:48,705 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-07-09 18:18:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:48,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585106573] [2021-07-09 18:18:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:48,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585106573] [2021-07-09 18:18:48,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585106573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148282994] [2021-07-09 18:18:48,776 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:48,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:48,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:48,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:18:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:49,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:49,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:49,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:49,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:49,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:49,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:49,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-09 18:18:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:49,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148282994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:49,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:49,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-07-09 18:18:49,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235031470] [2021-07-09 18:18:49,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:18:49,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:18:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:18:49,269 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:51,569 INFO L93 Difference]: Finished difference Result 2052 states and 8564 transitions. [2021-07-09 18:18:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:18:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:51,573 INFO L225 Difference]: With dead ends: 2052 [2021-07-09 18:18:51,573 INFO L226 Difference]: Without dead ends: 2008 [2021-07-09 18:18:51,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:18:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-09 18:18:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-07-09 18:18:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 4.634984025559105) internal successors, (5803), 1252 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-07-09 18:18:51,596 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-07-09 18:18:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:51,596 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-07-09 18:18:51,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-07-09 18:18:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:51,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:51,598 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:51,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-09 18:18:51,799 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:51,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-07-09 18:18:51,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:51,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243924023] [2021-07-09 18:18:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:52,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:52,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243924023] [2021-07-09 18:18:52,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243924023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:52,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907380750] [2021-07-09 18:18:52,013 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:18:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:52,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907380750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:52,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:52,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:52,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628434874] [2021-07-09 18:18:52,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:52,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:52,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:52,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:52,559 INFO L87 Difference]: Start difference. First operand 1253 states and 5803 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:52,891 INFO L93 Difference]: Finished difference Result 1300 states and 5927 transitions. [2021-07-09 18:18:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:52,895 INFO L225 Difference]: With dead ends: 1300 [2021-07-09 18:18:52,895 INFO L226 Difference]: Without dead ends: 1285 [2021-07-09 18:18:52,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 751.9ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-07-09 18:18:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-07-09 18:18:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 4.629777070063694) internal successors, (5815), 1256 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-07-09 18:18:52,914 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-07-09 18:18:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:52,914 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-07-09 18:18:52,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-07-09 18:18:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:52,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:52,917 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:53,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:53,121 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-07-09 18:18:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:53,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990936926] [2021-07-09 18:18:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:53,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990936926] [2021-07-09 18:18:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990936926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994574170] [2021-07-09 18:18:53,204 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:53,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:53,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:18:53,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:53,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:18:53,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:53,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:53,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:18:53,487 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-07-09 18:18:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994574170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:53,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:53,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 18:18:53,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258257897] [2021-07-09 18:18:53,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:18:53,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:18:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:18:53,630 INFO L87 Difference]: Start difference. First operand 1257 states and 5815 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:53,964 INFO L93 Difference]: Finished difference Result 1292 states and 5884 transitions. [2021-07-09 18:18:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:18:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:53,968 INFO L225 Difference]: With dead ends: 1292 [2021-07-09 18:18:53,968 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 18:18:53,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:18:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 18:18:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-07-09 18:18:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 4.6256) internal successors, (5782), 1250 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-07-09 18:18:53,988 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-07-09 18:18:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:53,988 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-07-09 18:18:53,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-07-09 18:18:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:53,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:53,990 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:54,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-07-09 18:18:54,191 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-07-09 18:18:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:54,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029598778] [2021-07-09 18:18:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:54,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029598778] [2021-07-09 18:18:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029598778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:54,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997623557] [2021-07-09 18:18:54,376 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:54,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:18:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997623557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:54,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:54,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:54,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870078415] [2021-07-09 18:18:54,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:54,878 INFO L87 Difference]: Start difference. First operand 1251 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:55,204 INFO L93 Difference]: Finished difference Result 1290 states and 5886 transitions. [2021-07-09 18:18:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:55,207 INFO L225 Difference]: With dead ends: 1290 [2021-07-09 18:18:55,207 INFO L226 Difference]: Without dead ends: 1275 [2021-07-09 18:18:55,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-09 18:18:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-07-09 18:18:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 4.6306089743589745) internal successors, (5779), 1248 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-07-09 18:18:55,226 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-07-09 18:18:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:55,226 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-07-09 18:18:55,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-07-09 18:18:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:55,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:55,228 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:55,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:55,429 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-07-09 18:18:55,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:55,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331115452] [2021-07-09 18:18:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:55,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331115452] [2021-07-09 18:18:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331115452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793133450] [2021-07-09 18:18:55,582 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:55,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:18:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:55,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:56,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793133450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:56,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:56,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:56,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12154510] [2021-07-09 18:18:56,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:56,154 INFO L87 Difference]: Start difference. First operand 1249 states and 5779 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:56,506 INFO L93 Difference]: Finished difference Result 1291 states and 5884 transitions. [2021-07-09 18:18:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:18:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:56,509 INFO L225 Difference]: With dead ends: 1291 [2021-07-09 18:18:56,509 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 18:18:56,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 18:18:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-07-09 18:18:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 4.642453591606134) internal successors, (5752), 1239 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-07-09 18:18:56,527 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-07-09 18:18:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:56,528 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-07-09 18:18:56,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-07-09 18:18:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:56,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:56,530 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:56,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-07-09 18:18:56,730 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-07-09 18:18:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631046516] [2021-07-09 18:18:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:56,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:56,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631046516] [2021-07-09 18:18:56,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631046516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:56,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226528295] [2021-07-09 18:18:56,886 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:18:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226528295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:57,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:57,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019405666] [2021-07-09 18:18:57,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:57,493 INFO L87 Difference]: Start difference. First operand 1240 states and 5752 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:58,035 INFO L93 Difference]: Finished difference Result 1276 states and 5860 transitions. [2021-07-09 18:18:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:18:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:58,038 INFO L225 Difference]: With dead ends: 1276 [2021-07-09 18:18:58,038 INFO L226 Difference]: Without dead ends: 1267 [2021-07-09 18:18:58,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:18:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-09 18:18:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-07-09 18:18:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.662866449511401) internal successors, (5726), 1228 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-07-09 18:18:58,055 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-07-09 18:18:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:58,055 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-07-09 18:18:58,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-07-09 18:18:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:58,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:58,058 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:58,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-09 18:18:58,260 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:58,260 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-07-09 18:18:58,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:58,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021454950] [2021-07-09 18:18:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:58,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021454950] [2021-07-09 18:18:58,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021454950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817568948] [2021-07-09 18:18:58,452 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:58,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:58,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:18:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817568948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:59,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:59,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:18:59,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231277377] [2021-07-09 18:18:59,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:59,102 INFO L87 Difference]: Start difference. First operand 1229 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:59,576 INFO L93 Difference]: Finished difference Result 1274 states and 5850 transitions. [2021-07-09 18:18:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:18:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:18:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:59,579 INFO L225 Difference]: With dead ends: 1274 [2021-07-09 18:18:59,579 INFO L226 Difference]: Without dead ends: 1265 [2021-07-09 18:18:59,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 960.3ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-09 18:18:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-07-09 18:18:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 4.677049180327868) internal successors, (5706), 1220 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-07-09 18:18:59,599 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-07-09 18:18:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:59,599 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-07-09 18:18:59,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-07-09 18:18:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:18:59,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:59,602 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:59,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 18:18:59,802 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-07-09 18:18:59,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:59,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124160350] [2021-07-09 18:18:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:59,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:59,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124160350] [2021-07-09 18:18:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124160350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:59,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620365967] [2021-07-09 18:18:59,959 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:00,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:19:00,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:00,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620365967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:00,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:00,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:19:00,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000205067] [2021-07-09 18:19:00,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:00,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:00,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:00,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:00,658 INFO L87 Difference]: Start difference. First operand 1221 states and 5706 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:01,145 INFO L93 Difference]: Finished difference Result 1266 states and 5830 transitions. [2021-07-09 18:19:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:19:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:19:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:01,148 INFO L225 Difference]: With dead ends: 1266 [2021-07-09 18:19:01,148 INFO L226 Difference]: Without dead ends: 1257 [2021-07-09 18:19:01,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 961.8ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-09 18:19:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-07-09 18:19:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 4.70216306156406) internal successors, (5652), 1202 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-07-09 18:19:01,170 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-07-09 18:19:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:01,170 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-07-09 18:19:01,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-07-09 18:19:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:01,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:01,172 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:01,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:01,372 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-07-09 18:19:01,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:01,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590440888] [2021-07-09 18:19:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:01,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:01,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590440888] [2021-07-09 18:19:01,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590440888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:01,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100349145] [2021-07-09 18:19:01,515 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:01,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:01,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:19:01,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:01,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:01,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:01,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:01,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:01,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:19:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:01,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100349145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:01,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:01,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-09 18:19:01,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534645543] [2021-07-09 18:19:01,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:01,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:01,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:01,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:01,951 INFO L87 Difference]: Start difference. First operand 1203 states and 5652 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:02,251 INFO L93 Difference]: Finished difference Result 1400 states and 6258 transitions. [2021-07-09 18:19:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:19:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:19:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:02,256 INFO L225 Difference]: With dead ends: 1400 [2021-07-09 18:19:02,256 INFO L226 Difference]: Without dead ends: 1391 [2021-07-09 18:19:02,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-07-09 18:19:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-07-09 18:19:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.676090468497577) internal successors, (5789), 1238 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-07-09 18:19:02,277 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-07-09 18:19:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:02,277 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-07-09 18:19:02,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-07-09 18:19:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:02,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:02,280 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:02,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:02,496 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-07-09 18:19:02,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:02,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714770361] [2021-07-09 18:19:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:02,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714770361] [2021-07-09 18:19:02,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714770361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958206835] [2021-07-09 18:19:02,693 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:02,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:19:02,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:03,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958206835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:03,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:03,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:03,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194616672] [2021-07-09 18:19:03,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:03,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:03,340 INFO L87 Difference]: Start difference. First operand 1239 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:03,636 INFO L93 Difference]: Finished difference Result 1286 states and 5928 transitions. [2021-07-09 18:19:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:03,639 INFO L225 Difference]: With dead ends: 1286 [2021-07-09 18:19:03,639 INFO L226 Difference]: Without dead ends: 1278 [2021-07-09 18:19:03,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 757.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-07-09 18:19:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-07-09 18:19:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 4.674698795180723) internal successors, (5820), 1245 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-07-09 18:19:03,658 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-07-09 18:19:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:03,658 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-07-09 18:19:03,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-07-09 18:19:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:03,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:03,660 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:03,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:03,861 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:03,861 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-07-09 18:19:03,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:03,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270663313] [2021-07-09 18:19:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:04,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:04,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270663313] [2021-07-09 18:19:04,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270663313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:04,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907507251] [2021-07-09 18:19:04,074 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:04,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:19:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:04,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:04,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:04,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:04,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:04,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:04,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-09 18:19:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907507251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:19:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417019646] [2021-07-09 18:19:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:04,525 INFO L87 Difference]: Start difference. First operand 1246 states and 5820 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:05,066 INFO L93 Difference]: Finished difference Result 1353 states and 6064 transitions. [2021-07-09 18:19:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:05,069 INFO L225 Difference]: With dead ends: 1353 [2021-07-09 18:19:05,069 INFO L226 Difference]: Without dead ends: 1341 [2021-07-09 18:19:05,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 827.9ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-07-09 18:19:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-07-09 18:19:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 4.657303370786517) internal successors, (5803), 1246 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-07-09 18:19:05,089 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-07-09 18:19:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:05,089 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-07-09 18:19:05,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-07-09 18:19:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:05,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:05,091 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:05,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:05,292 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-07-09 18:19:05,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:05,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194728829] [2021-07-09 18:19:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:05,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194728829] [2021-07-09 18:19:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194728829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436861636] [2021-07-09 18:19:05,408 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:19:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:05,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:05,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:05,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:05,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:05,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:19:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:19:05,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436861636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:05,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:05,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-09 18:19:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696953838] [2021-07-09 18:19:05,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:05,799 INFO L87 Difference]: Start difference. First operand 1247 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:06,218 INFO L93 Difference]: Finished difference Result 2674 states and 11664 transitions. [2021-07-09 18:19:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:19:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:19:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:06,225 INFO L225 Difference]: With dead ends: 2674 [2021-07-09 18:19:06,225 INFO L226 Difference]: Without dead ends: 2633 [2021-07-09 18:19:06,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:19:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-07-09 18:19:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-07-09 18:19:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.881949210706932) internal successors, (7113), 1457 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-07-09 18:19:06,258 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-07-09 18:19:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:06,258 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-07-09 18:19:06,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-07-09 18:19:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:06,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:06,261 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:06,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-07-09 18:19:06,461 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-07-09 18:19:06,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:06,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727302166] [2021-07-09 18:19:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:06,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:06,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727302166] [2021-07-09 18:19:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727302166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088982108] [2021-07-09 18:19:06,701 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:06,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:07,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088982108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:07,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:07,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:07,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205519962] [2021-07-09 18:19:07,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:07,305 INFO L87 Difference]: Start difference. First operand 1458 states and 7113 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:07,929 INFO L93 Difference]: Finished difference Result 1507 states and 7259 transitions. [2021-07-09 18:19:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:19:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:07,933 INFO L225 Difference]: With dead ends: 1507 [2021-07-09 18:19:07,933 INFO L226 Difference]: Without dead ends: 1499 [2021-07-09 18:19:07,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:19:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-07-09 18:19:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-07-09 18:19:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 4.885538039753255) internal successors, (7128), 1459 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-07-09 18:19:07,956 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-07-09 18:19:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:07,956 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-07-09 18:19:07,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-07-09 18:19:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:07,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:07,959 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:08,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:19:08,160 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-07-09 18:19:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746056404] [2021-07-09 18:19:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:08,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746056404] [2021-07-09 18:19:08,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746056404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656884252] [2021-07-09 18:19:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:19:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656884252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369613451] [2021-07-09 18:19:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:09,081 INFO L87 Difference]: Start difference. First operand 1460 states and 7128 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:09,553 INFO L93 Difference]: Finished difference Result 1520 states and 7319 transitions. [2021-07-09 18:19:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:09,557 INFO L225 Difference]: With dead ends: 1520 [2021-07-09 18:19:09,557 INFO L226 Difference]: Without dead ends: 1515 [2021-07-09 18:19:09,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 957.7ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:19:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-09 18:19:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-07-09 18:19:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 4.8756830601092895) internal successors, (7138), 1464 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-07-09 18:19:09,584 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-07-09 18:19:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:09,584 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-07-09 18:19:09,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-07-09 18:19:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:09,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:09,588 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:09,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:09,801 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-07-09 18:19:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:09,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895369222] [2021-07-09 18:19:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:09,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:09,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895369222] [2021-07-09 18:19:09,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895369222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:09,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766146313] [2021-07-09 18:19:09,906 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:09,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:19:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:10,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:10,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:10,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:10,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:10,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:10,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-07-09 18:19:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766146313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:10,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:19:10,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775733362] [2021-07-09 18:19:10,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:19:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:19:10,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:19:10,347 INFO L87 Difference]: Start difference. First operand 1465 states and 7138 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:14,598 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 18:19:16,792 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-07-09 18:19:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:18,972 INFO L93 Difference]: Finished difference Result 1797 states and 8266 transitions. [2021-07-09 18:19:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:19:18,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:19:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:18,976 INFO L225 Difference]: With dead ends: 1797 [2021-07-09 18:19:18,976 INFO L226 Difference]: Without dead ends: 1781 [2021-07-09 18:19:18,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 6704.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-09 18:19:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1513. [2021-07-09 18:19:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 4.866402116402116) internal successors, (7358), 1512 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-07-09 18:19:19,002 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-07-09 18:19:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:19,002 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-07-09 18:19:19,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-07-09 18:19:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:19,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:19,005 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:19,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-09 18:19:19,228 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-07-09 18:19:19,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:19,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311754363] [2021-07-09 18:19:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:19,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311754363] [2021-07-09 18:19:19,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311754363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:19,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661106846] [2021-07-09 18:19:19,359 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:19,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:19:19,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:19:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:19,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:19,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:19,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:19,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:19,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:19,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 18:19:19,935 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-09 18:19:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661106846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:20,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:20,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:19:20,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409674539] [2021-07-09 18:19:20,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:20,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:20,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:20,199 INFO L87 Difference]: Start difference. First operand 1513 states and 7358 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,605 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-07-09 18:19:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:20,636 INFO L93 Difference]: Finished difference Result 1848 states and 7788 transitions. [2021-07-09 18:19:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:19:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:20,641 INFO L225 Difference]: With dead ends: 1848 [2021-07-09 18:19:20,641 INFO L226 Difference]: Without dead ends: 1812 [2021-07-09 18:19:20,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-07-09 18:19:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-07-09 18:19:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.560519902518278) internal successors, (5614), 1231 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-07-09 18:19:20,665 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-07-09 18:19:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:20,665 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-07-09 18:19:20,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-07-09 18:19:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:20,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:20,667 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:20,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:20,868 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:20,868 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-07-09 18:19:20,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:20,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256811771] [2021-07-09 18:19:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256811771] [2021-07-09 18:19:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256811771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688043982] [2021-07-09 18:19:21,049 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:21,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:19:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688043982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:21,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844287462] [2021-07-09 18:19:21,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:21,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:21,571 INFO L87 Difference]: Start difference. First operand 1232 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:21,906 INFO L93 Difference]: Finished difference Result 1287 states and 5773 transitions. [2021-07-09 18:19:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:19:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:21,909 INFO L225 Difference]: With dead ends: 1287 [2021-07-09 18:19:21,909 INFO L226 Difference]: Without dead ends: 1279 [2021-07-09 18:19:21,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 682.9ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-07-09 18:19:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-07-09 18:19:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.556809024979855) internal successors, (5655), 1241 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-07-09 18:19:21,926 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-07-09 18:19:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:21,926 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-07-09 18:19:21,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-07-09 18:19:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:21,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:21,928 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:22,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-09 18:19:22,130 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-07-09 18:19:22,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:22,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980415105] [2021-07-09 18:19:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:22,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:22,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980415105] [2021-07-09 18:19:22,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980415105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839745859] [2021-07-09 18:19:22,266 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:19:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:22,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:22,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:22,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:19:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839745859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:22,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-09 18:19:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751531264] [2021-07-09 18:19:22,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:22,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:22,649 INFO L87 Difference]: Start difference. First operand 1242 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:23,067 INFO L93 Difference]: Finished difference Result 1370 states and 6000 transitions. [2021-07-09 18:19:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:19:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:23,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:23,070 INFO L225 Difference]: With dead ends: 1370 [2021-07-09 18:19:23,070 INFO L226 Difference]: Without dead ends: 1358 [2021-07-09 18:19:23,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:19:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-07-09 18:19:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-07-09 18:19:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 4.54066985645933) internal successors, (5694), 1254 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-07-09 18:19:23,090 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-07-09 18:19:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:23,091 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-07-09 18:19:23,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-07-09 18:19:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:23,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:23,093 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:23,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:23,295 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-07-09 18:19:23,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:23,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205086071] [2021-07-09 18:19:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:23,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:23,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205086071] [2021-07-09 18:19:23,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205086071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:23,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746478161] [2021-07-09 18:19:23,509 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:23,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:24,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746478161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:24,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:24,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:24,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836478894] [2021-07-09 18:19:24,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:24,110 INFO L87 Difference]: Start difference. First operand 1255 states and 5694 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:24,433 INFO L93 Difference]: Finished difference Result 1289 states and 5778 transitions. [2021-07-09 18:19:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:24,449 INFO L225 Difference]: With dead ends: 1289 [2021-07-09 18:19:24,449 INFO L226 Difference]: Without dead ends: 1277 [2021-07-09 18:19:24,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-07-09 18:19:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-07-09 18:19:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 4.545163868904876) internal successors, (5686), 1251 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-07-09 18:19:24,468 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-07-09 18:19:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:24,468 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-07-09 18:19:24,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-07-09 18:19:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:24,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:24,471 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:24,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-09 18:19:24,685 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-07-09 18:19:24,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:24,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404242985] [2021-07-09 18:19:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:24,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:24,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404242985] [2021-07-09 18:19:24,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404242985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229500050] [2021-07-09 18:19:24,914 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:24,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:19:24,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:25,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229500050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:25,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:25,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:25,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922977336] [2021-07-09 18:19:25,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:25,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:25,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:25,641 INFO L87 Difference]: Start difference. First operand 1252 states and 5686 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:25,968 INFO L93 Difference]: Finished difference Result 1295 states and 5809 transitions. [2021-07-09 18:19:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:19:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:25,972 INFO L225 Difference]: With dead ends: 1295 [2021-07-09 18:19:25,972 INFO L226 Difference]: Without dead ends: 1287 [2021-07-09 18:19:25,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 909.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-09 18:19:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-07-09 18:19:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 4.5474860335195535) internal successors, (5698), 1253 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-07-09 18:19:25,991 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-07-09 18:19:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:25,991 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-07-09 18:19:25,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-07-09 18:19:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:25,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:25,993 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:26,201 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-07-09 18:19:26,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:26,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073777048] [2021-07-09 18:19:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:26,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073777048] [2021-07-09 18:19:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073777048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658388936] [2021-07-09 18:19:26,417 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:26,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:27,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658388936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:27,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:27,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679786241] [2021-07-09 18:19:27,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:27,007 INFO L87 Difference]: Start difference. First operand 1254 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:27,273 INFO L93 Difference]: Finished difference Result 1301 states and 5846 transitions. [2021-07-09 18:19:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:27,276 INFO L225 Difference]: With dead ends: 1301 [2021-07-09 18:19:27,276 INFO L226 Difference]: Without dead ends: 1296 [2021-07-09 18:19:27,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 712.5ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-07-09 18:19:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-07-09 18:19:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.551641313050441) internal successors, (5685), 1249 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-07-09 18:19:27,294 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-07-09 18:19:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:27,294 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-07-09 18:19:27,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-07-09 18:19:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:27,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:27,296 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:27,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 18:19:27,496 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-07-09 18:19:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136744828] [2021-07-09 18:19:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:27,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:27,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136744828] [2021-07-09 18:19:27,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136744828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:27,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611123577] [2021-07-09 18:19:27,742 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:27,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:19:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:28,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611123577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:28,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:28,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:28,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401293117] [2021-07-09 18:19:28,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:28,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:28,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:28,349 INFO L87 Difference]: Start difference. First operand 1250 states and 5685 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:28,650 INFO L93 Difference]: Finished difference Result 1389 states and 6092 transitions. [2021-07-09 18:19:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:19:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:28,653 INFO L225 Difference]: With dead ends: 1389 [2021-07-09 18:19:28,653 INFO L226 Difference]: Without dead ends: 1381 [2021-07-09 18:19:28,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-07-09 18:19:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-07-09 18:19:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 4.563607085346216) internal successors, (5668), 1242 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-07-09 18:19:28,672 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-07-09 18:19:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:28,672 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-07-09 18:19:28,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-07-09 18:19:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:28,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:28,674 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:28,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-09 18:19:28,874 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-07-09 18:19:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:28,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379781884] [2021-07-09 18:19:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:29,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:29,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379781884] [2021-07-09 18:19:29,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379781884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:29,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883760529] [2021-07-09 18:19:29,009 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:29,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:19:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:29,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:19:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:29,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:29,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:29,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:29,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:29,640 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-07-09 18:19:29,640 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-07-09 18:19:29,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:29,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:29,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:29,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:29,710 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-07-09 18:19:29,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:29,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-07-09 18:19:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883760529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:29,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:19:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386555858] [2021-07-09 18:19:29,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:29,814 INFO L87 Difference]: Start difference. First operand 1243 states and 5668 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:30,205 INFO L93 Difference]: Finished difference Result 1300 states and 5767 transitions. [2021-07-09 18:19:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:19:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:19:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:30,208 INFO L225 Difference]: With dead ends: 1300 [2021-07-09 18:19:30,209 INFO L226 Difference]: Without dead ends: 1284 [2021-07-09 18:19:30,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:19:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-07-09 18:19:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-07-09 18:19:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.554119547657512) internal successors, (5638), 1238 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-07-09 18:19:30,226 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-07-09 18:19:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:30,226 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-07-09 18:19:30,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-07-09 18:19:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:30,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:30,229 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:30,437 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-07-09 18:19:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130594561] [2021-07-09 18:19:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:30,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:30,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130594561] [2021-07-09 18:19:30,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130594561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:30,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786161324] [2021-07-09 18:19:30,563 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:19:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:30,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:30,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:30,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:30,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:30,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:19:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:30,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786161324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:30,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:30,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-09 18:19:30,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164623288] [2021-07-09 18:19:30,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:19:30,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:19:30,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:19:30,945 INFO L87 Difference]: Start difference. First operand 1239 states and 5638 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:31,193 INFO L93 Difference]: Finished difference Result 1002 states and 4294 transitions. [2021-07-09 18:19:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:19:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:31,195 INFO L225 Difference]: With dead ends: 1002 [2021-07-09 18:19:31,195 INFO L226 Difference]: Without dead ends: 994 [2021-07-09 18:19:31,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-09 18:19:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-07-09 18:19:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.34737923946557) internal successors, (4230), 973 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-07-09 18:19:31,209 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-07-09 18:19:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:31,210 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-07-09 18:19:31,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-07-09 18:19:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:31,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:31,211 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:31,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:31,412 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-07-09 18:19:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:31,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274545105] [2021-07-09 18:19:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:31,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:31,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274545105] [2021-07-09 18:19:31,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274545105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:31,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023324046] [2021-07-09 18:19:31,604 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:31,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:31,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:19:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023324046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:32,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:32,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584840132] [2021-07-09 18:19:32,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:32,273 INFO L87 Difference]: Start difference. First operand 974 states and 4230 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:32,963 INFO L93 Difference]: Finished difference Result 1025 states and 4377 transitions. [2021-07-09 18:19:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:19:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:32,966 INFO L225 Difference]: With dead ends: 1025 [2021-07-09 18:19:32,966 INFO L226 Difference]: Without dead ends: 1017 [2021-07-09 18:19:32,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1171.3ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:19:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-09 18:19:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-07-09 18:19:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 4.336040609137056) internal successors, (4271), 985 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-07-09 18:19:32,981 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-07-09 18:19:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:32,981 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-07-09 18:19:32,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-07-09 18:19:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:32,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:32,983 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:33,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:33,183 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:33,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-07-09 18:19:33,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:33,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483824009] [2021-07-09 18:19:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:33,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:33,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483824009] [2021-07-09 18:19:33,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483824009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:33,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365387781] [2021-07-09 18:19:33,415 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:33,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:19:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:34,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365387781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:34,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:34,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846577254] [2021-07-09 18:19:34,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:34,028 INFO L87 Difference]: Start difference. First operand 986 states and 4271 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:34,385 INFO L93 Difference]: Finished difference Result 1033 states and 4401 transitions. [2021-07-09 18:19:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:19:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:34,388 INFO L225 Difference]: With dead ends: 1033 [2021-07-09 18:19:34,388 INFO L226 Difference]: Without dead ends: 1025 [2021-07-09 18:19:34,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-09 18:19:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-07-09 18:19:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 4.354209445585216) internal successors, (4241), 974 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-07-09 18:19:34,412 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-07-09 18:19:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:34,412 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-07-09 18:19:34,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-07-09 18:19:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:34,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:34,413 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:34,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 18:19:34,614 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-07-09 18:19:34,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:34,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630184484] [2021-07-09 18:19:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:34,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630184484] [2021-07-09 18:19:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630184484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621932435] [2021-07-09 18:19:34,818 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:34,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621932435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:35,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:35,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:35,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388679637] [2021-07-09 18:19:35,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:35,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:35,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:35,511 INFO L87 Difference]: Start difference. First operand 975 states and 4241 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:35,855 INFO L93 Difference]: Finished difference Result 1021 states and 4369 transitions. [2021-07-09 18:19:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:35,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:35,857 INFO L225 Difference]: With dead ends: 1021 [2021-07-09 18:19:35,858 INFO L226 Difference]: Without dead ends: 1013 [2021-07-09 18:19:35,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-07-09 18:19:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-07-09 18:19:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.362795477903392) internal successors, (4245), 973 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-07-09 18:19:35,871 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-07-09 18:19:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:35,871 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-07-09 18:19:35,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-07-09 18:19:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:35,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:35,873 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:36,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 18:19:36,074 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-07-09 18:19:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:36,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516023510] [2021-07-09 18:19:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:36,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516023510] [2021-07-09 18:19:36,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516023510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:36,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770218862] [2021-07-09 18:19:36,234 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:36,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:19:36,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:19:36,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:36,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:36,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:36,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:36,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:36,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:36,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:19:36,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-07-09 18:19:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770218862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:36,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:36,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-09 18:19:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579168889] [2021-07-09 18:19:36,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:19:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:19:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:19:36,964 INFO L87 Difference]: Start difference. First operand 974 states and 4245 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:37,050 INFO L93 Difference]: Finished difference Result 995 states and 4253 transitions. [2021-07-09 18:19:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:19:37,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:37,053 INFO L225 Difference]: With dead ends: 995 [2021-07-09 18:19:37,053 INFO L226 Difference]: Without dead ends: 985 [2021-07-09 18:19:37,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:19:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-09 18:19:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-07-09 18:19:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.353430353430354) internal successors, (4188), 962 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-07-09 18:19:37,066 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-07-09 18:19:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:37,067 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-07-09 18:19:37,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-07-09 18:19:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:37,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:37,068 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:37,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-09 18:19:37,269 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-07-09 18:19:37,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:37,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248236953] [2021-07-09 18:19:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:37,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:37,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248236953] [2021-07-09 18:19:37,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248236953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:37,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923040791] [2021-07-09 18:19:37,434 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:37,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:19:37,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:37,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:19:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:38,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923040791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:38,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:38,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535375383] [2021-07-09 18:19:38,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:38,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:38,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:38,008 INFO L87 Difference]: Start difference. First operand 963 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:38,298 INFO L93 Difference]: Finished difference Result 1008 states and 4333 transitions. [2021-07-09 18:19:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:19:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:38,300 INFO L225 Difference]: With dead ends: 1008 [2021-07-09 18:19:38,300 INFO L226 Difference]: Without dead ends: 1003 [2021-07-09 18:19:38,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-07-09 18:19:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-07-09 18:19:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 4.348547717842323) internal successors, (4192), 964 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-07-09 18:19:38,315 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-07-09 18:19:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:38,315 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-07-09 18:19:38,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-07-09 18:19:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:38,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:38,317 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:38,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-07-09 18:19:38,517 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-07-09 18:19:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:38,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695068083] [2021-07-09 18:19:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:38,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695068083] [2021-07-09 18:19:38,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695068083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87688209] [2021-07-09 18:19:38,783 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:19:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87688209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:39,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:39,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309511541] [2021-07-09 18:19:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:39,397 INFO L87 Difference]: Start difference. First operand 965 states and 4192 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:39,994 INFO L93 Difference]: Finished difference Result 1251 states and 5174 transitions. [2021-07-09 18:19:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:19:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:19:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:39,998 INFO L225 Difference]: With dead ends: 1251 [2021-07-09 18:19:39,998 INFO L226 Difference]: Without dead ends: 1222 [2021-07-09 18:19:39,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 894.5ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:19:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-07-09 18:19:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-07-09 18:19:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 4.33719806763285) internal successors, (4489), 1035 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-07-09 18:19:40,014 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-07-09 18:19:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:40,014 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-07-09 18:19:40,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-07-09 18:19:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:19:40,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:40,016 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:40,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-09 18:19:40,216 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:40,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-07-09 18:19:40,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:40,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644221377] [2021-07-09 18:19:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:40,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:40,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644221377] [2021-07-09 18:19:40,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644221377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:40,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719335469] [2021-07-09 18:19:40,376 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:19:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:40,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:40,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:40,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:40,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:41,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:41,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:19:41,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:41,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:41,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 18:19:41,092 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-09 18:20:52,194 WARN L205 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-09 18:20:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:52,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719335469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:52,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:52,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-09 18:20:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784433692] [2021-07-09 18:20:52,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:20:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:52,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:20:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:20:52,311 INFO L87 Difference]: Start difference. First operand 1036 states and 4489 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,411 WARN L205 SmtUtils]: Spent 59.71 s on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-07-09 18:21:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:52,474 INFO L93 Difference]: Finished difference Result 1372 states and 5445 transitions. [2021-07-09 18:21:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:21:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 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 26 [2021-07-09 18:21:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:52,477 INFO L225 Difference]: With dead ends: 1372 [2021-07-09 18:21:52,477 INFO L226 Difference]: Without dead ends: 1354 [2021-07-09 18:21:52,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 131492.0ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:21:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-09 18:21:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-07-09 18:21:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.269906928645295) internal successors, (4129), 967 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-07-09 18:21:52,492 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-07-09 18:21:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:52,493 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-07-09 18:21:52,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-07-09 18:21:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:21:52,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:52,494 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:52,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-07-09 18:21:52,695 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-07-09 18:21:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:52,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539919110] [2021-07-09 18:21:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:52,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539919110] [2021-07-09 18:21:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539919110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50003117] [2021-07-09 18:21:52,903 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:52,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:21:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:21:52,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50003117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:53,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:53,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:21:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454947717] [2021-07-09 18:21:53,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:21:53,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:21:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:21:53,567 INFO L87 Difference]: Start difference. First operand 968 states and 4129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:53,839 INFO L93 Difference]: Finished difference Result 1031 states and 4316 transitions. [2021-07-09 18:21:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:21:53,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:21:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:53,841 INFO L225 Difference]: With dead ends: 1031 [2021-07-09 18:21:53,841 INFO L226 Difference]: Without dead ends: 1023 [2021-07-09 18:21:53,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:21:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-07-09 18:21:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-07-09 18:21:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 4.259183673469388) internal successors, (4174), 980 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-07-09 18:21:53,855 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-07-09 18:21:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:53,855 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-07-09 18:21:53,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-07-09 18:21:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:21:53,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:53,856 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-07-09 18:21:54,057 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-07-09 18:21:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059492585] [2021-07-09 18:21:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:54,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059492585] [2021-07-09 18:21:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059492585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:54,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570395705] [2021-07-09 18:21:54,209 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:54,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:54,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:21:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:54,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:21:54,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:21:54,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:54,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:54,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:21:54,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-07-09 18:21:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570395705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:54,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:54,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-07-09 18:21:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852209027] [2021-07-09 18:21:54,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:21:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:21:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:21:54,641 INFO L87 Difference]: Start difference. First operand 981 states and 4174 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:59,018 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-09 18:22:03,150 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-07-09 18:22:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:03,410 INFO L93 Difference]: Finished difference Result 1006 states and 4214 transitions. [2021-07-09 18:22:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:22:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:22:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:03,413 INFO L225 Difference]: With dead ends: 1006 [2021-07-09 18:22:03,413 INFO L226 Difference]: Without dead ends: 998 [2021-07-09 18:22:03,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8762.4ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:22:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-07-09 18:22:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 972. [2021-07-09 18:22:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.25643666323378) internal successors, (4133), 971 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-07-09 18:22:03,427 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-07-09 18:22:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:03,427 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-07-09 18:22:03,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-07-09 18:22:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:22:03,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:03,429 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:03,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-09 18:22:03,634 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-07-09 18:22:03,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:03,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747924593] [2021-07-09 18:22:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:03,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:03,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747924593] [2021-07-09 18:22:03,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747924593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:03,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652910340] [2021-07-09 18:22:03,851 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:03,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:22:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:04,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652910340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:04,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:04,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:22:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148025872] [2021-07-09 18:22:04,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:22:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:22:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:04,339 INFO L87 Difference]: Start difference. First operand 972 states and 4133 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:04,637 INFO L93 Difference]: Finished difference Result 1074 states and 4467 transitions. [2021-07-09 18:22:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:22:04,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:22:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:04,639 INFO L225 Difference]: With dead ends: 1074 [2021-07-09 18:22:04,639 INFO L226 Difference]: Without dead ends: 1064 [2021-07-09 18:22:04,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:22:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-09 18:22:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-07-09 18:22:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.235707121364093) internal successors, (4223), 997 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-07-09 18:22:04,653 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-07-09 18:22:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:04,653 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-07-09 18:22:04,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-07-09 18:22:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:22:04,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:04,655 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:04,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:04,855 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-07-09 18:22:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:04,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327434921] [2021-07-09 18:22:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:04,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:04,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327434921] [2021-07-09 18:22:04,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327434921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:04,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441342818] [2021-07-09 18:22:04,982 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:05,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:22:05,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:22:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:05,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:05,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:05,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:05,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:05,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:22:05,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-07-09 18:22:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441342818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:05,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:05,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-07-09 18:22:05,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431379987] [2021-07-09 18:22:05,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:22:05,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:22:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:22:05,587 INFO L87 Difference]: Start difference. First operand 998 states and 4223 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:05,851 INFO L93 Difference]: Finished difference Result 1103 states and 4427 transitions. [2021-07-09 18:22:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:22:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:22:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:05,853 INFO L225 Difference]: With dead ends: 1103 [2021-07-09 18:22:05,853 INFO L226 Difference]: Without dead ends: 1087 [2021-07-09 18:22:05,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-09 18:22:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-07-09 18:22:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-07-09 18:22:05,867 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-07-09 18:22:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:05,867 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-07-09 18:22:05,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-07-09 18:22:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:22:05,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:05,872 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:06,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:06,094 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-07-09 18:22:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:06,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816302452] [2021-07-09 18:22:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:06,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816302452] [2021-07-09 18:22:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816302452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:06,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128614746] [2021-07-09 18:22:06,258 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:22:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:06,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128614746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:06,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:06,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:22:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133082099] [2021-07-09 18:22:06,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:22:06,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:06,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:22:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:06,851 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:07,064 INFO L93 Difference]: Finished difference Result 1059 states and 4372 transitions. [2021-07-09 18:22:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:22:07,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:22:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:07,067 INFO L225 Difference]: With dead ends: 1059 [2021-07-09 18:22:07,067 INFO L226 Difference]: Without dead ends: 1051 [2021-07-09 18:22:07,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:22:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-07-09 18:22:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-07-09 18:22:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-07-09 18:22:07,081 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-07-09 18:22:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:07,081 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-07-09 18:22:07,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-07-09 18:22:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:22:07,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:07,082 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:07,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 18:22:07,283 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-07-09 18:22:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:07,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314263292] [2021-07-09 18:22:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:07,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:07,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314263292] [2021-07-09 18:22:07,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314263292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:07,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057231765] [2021-07-09 18:22:07,385 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:07,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:22:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:07,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:07,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:07,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:22:07,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-07-09 18:22:08,006 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-07-09 18:23:04,575 WARN L205 SmtUtils]: Spent 56.51 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-09 18:23:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:23:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057231765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:04,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:04,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 18:23:04,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520117439] [2021-07-09 18:23:04,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:23:04,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:23:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:23:04,666 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,561 WARN L205 SmtUtils]: Spent 1.45 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-07-09 18:24:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:31,651 INFO L93 Difference]: Finished difference Result 1021 states and 4224 transitions. [2021-07-09 18:24:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:24:31,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:31,653 INFO L225 Difference]: With dead ends: 1021 [2021-07-09 18:24:31,653 INFO L226 Difference]: Without dead ends: 1013 [2021-07-09 18:24:31,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 143747.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-07-09 18:24:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-07-09 18:24:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 4.202429149797571) internal successors, (4152), 988 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-07-09 18:24:31,666 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-07-09 18:24:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:31,666 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-07-09 18:24:31,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-07-09 18:24:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:31,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:31,668 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:31,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:31,869 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-07-09 18:24:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:31,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597498725] [2021-07-09 18:24:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:32,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:32,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597498725] [2021-07-09 18:24:32,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597498725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:32,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708807887] [2021-07-09 18:24:32,029 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:32,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:24:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:32,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:24:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:32,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708807887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:32,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:32,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:24:32,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679766122] [2021-07-09 18:24:32,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:32,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:32,623 INFO L87 Difference]: Start difference. First operand 989 states and 4152 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:32,984 INFO L93 Difference]: Finished difference Result 1036 states and 4291 transitions. [2021-07-09 18:24:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:24:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:32,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:32,986 INFO L225 Difference]: With dead ends: 1036 [2021-07-09 18:24:32,986 INFO L226 Difference]: Without dead ends: 1028 [2021-07-09 18:24:32,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 754.9ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:24:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-09 18:24:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-07-09 18:24:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 4.211382113821138) internal successors, (4144), 984 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-07-09 18:24:32,999 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-07-09 18:24:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:32,999 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-07-09 18:24:32,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-07-09 18:24:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:33,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:33,001 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:33,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 18:24:33,205 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-07-09 18:24:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150198140] [2021-07-09 18:24:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:33,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150198140] [2021-07-09 18:24:33,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150198140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:33,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950367835] [2021-07-09 18:24:33,426 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:33,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:24:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:34,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950367835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:34,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:34,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:24:34,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249538928] [2021-07-09 18:24:34,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:34,107 INFO L87 Difference]: Start difference. First operand 985 states and 4144 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:34,527 INFO L93 Difference]: Finished difference Result 1044 states and 4311 transitions. [2021-07-09 18:24:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:24:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:34,530 INFO L225 Difference]: With dead ends: 1044 [2021-07-09 18:24:34,530 INFO L226 Difference]: Without dead ends: 1036 [2021-07-09 18:24:34,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 943.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:24:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-07-09 18:24:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-07-09 18:24:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 4.214867617107943) internal successors, (4139), 982 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-07-09 18:24:34,544 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-07-09 18:24:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:34,544 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-07-09 18:24:34,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-07-09 18:24:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:34,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:34,546 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:34,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:34,746 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-07-09 18:24:34,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:34,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932368905] [2021-07-09 18:24:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:24:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932368905] [2021-07-09 18:24:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932368905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207791417] [2021-07-09 18:24:34,832 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:34,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:24:34,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:24:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:35,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:35,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:35,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:35,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:24:35,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-07-09 18:24:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:24:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207791417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:35,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:35,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 18:24:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910494454] [2021-07-09 18:24:35,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:24:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:24:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:24:35,491 INFO L87 Difference]: Start difference. First operand 983 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:35,690 INFO L93 Difference]: Finished difference Result 949 states and 3881 transitions. [2021-07-09 18:24:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:24:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:24:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:35,693 INFO L225 Difference]: With dead ends: 949 [2021-07-09 18:24:35,693 INFO L226 Difference]: Without dead ends: 939 [2021-07-09 18:24:35,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:24:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-09 18:24:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-07-09 18:24:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 4.175824175824176) internal successors, (3800), 910 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-07-09 18:24:35,710 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-07-09 18:24:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:35,710 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-07-09 18:24:35,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-07-09 18:24:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:35,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:35,712 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:35,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 18:24:35,933 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-07-09 18:24:35,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:35,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413628038] [2021-07-09 18:24:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:36,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:36,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413628038] [2021-07-09 18:24:36,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413628038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:36,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020829932] [2021-07-09 18:24:36,182 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:36,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:24:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:24:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:36,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020829932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:36,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:36,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:24:36,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659849444] [2021-07-09 18:24:36,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:36,833 INFO L87 Difference]: Start difference. First operand 911 states and 3800 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:37,186 INFO L93 Difference]: Finished difference Result 985 states and 4052 transitions. [2021-07-09 18:24:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:24:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:37,189 INFO L225 Difference]: With dead ends: 985 [2021-07-09 18:24:37,189 INFO L226 Difference]: Without dead ends: 975 [2021-07-09 18:24:37,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:24:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-07-09 18:24:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-07-09 18:24:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 4.168490153172867) internal successors, (3810), 914 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-07-09 18:24:37,201 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-07-09 18:24:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:37,201 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-07-09 18:24:37,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-07-09 18:24:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:37,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:37,202 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:37,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:37,403 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-07-09 18:24:37,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:37,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828560522] [2021-07-09 18:24:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:37,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:37,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828560522] [2021-07-09 18:24:37,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828560522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144666524] [2021-07-09 18:24:37,620 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:24:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:38,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144666524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:38,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:38,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:24:38,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193762722] [2021-07-09 18:24:38,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:38,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:38,306 INFO L87 Difference]: Start difference. First operand 915 states and 3810 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:38,718 INFO L93 Difference]: Finished difference Result 958 states and 3949 transitions. [2021-07-09 18:24:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:24:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:38,720 INFO L225 Difference]: With dead ends: 958 [2021-07-09 18:24:38,720 INFO L226 Difference]: Without dead ends: 953 [2021-07-09 18:24:38,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:24:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-09 18:24:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-07-09 18:24:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.181015452538631) internal successors, (3788), 906 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-07-09 18:24:38,732 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-07-09 18:24:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:38,733 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-07-09 18:24:38,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-07-09 18:24:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:24:38,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:38,734 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:38,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:38,935 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-07-09 18:24:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:38,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303625669] [2021-07-09 18:24:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:39,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:39,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303625669] [2021-07-09 18:24:39,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303625669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:39,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712284291] [2021-07-09 18:24:39,136 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:39,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:39,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:24:39,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712284291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:24:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046936609] [2021-07-09 18:24:39,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:39,748 INFO L87 Difference]: Start difference. First operand 907 states and 3788 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:40,133 INFO L93 Difference]: Finished difference Result 954 states and 3919 transitions. [2021-07-09 18:24:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:24:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-07-09 18:24:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:40,135 INFO L225 Difference]: With dead ends: 954 [2021-07-09 18:24:40,135 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 18:24:40,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:24:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 18:24:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-07-09 18:24:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 4.196868008948546) internal successors, (3752), 894 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-07-09 18:24:40,147 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-07-09 18:24:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:40,147 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-07-09 18:24:40,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-07-09 18:24:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:40,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:40,148 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:40,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 18:24:40,349 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-07-09 18:24:40,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:40,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386566597] [2021-07-09 18:24:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:40,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386566597] [2021-07-09 18:24:40,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386566597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785087797] [2021-07-09 18:24:40,523 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:40,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:24:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:24:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785087797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:41,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:41,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:41,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578570215] [2021-07-09 18:24:41,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:41,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:41,274 INFO L87 Difference]: Start difference. First operand 895 states and 3752 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:41,548 INFO L93 Difference]: Finished difference Result 925 states and 3819 transitions. [2021-07-09 18:24:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:24:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:41,550 INFO L225 Difference]: With dead ends: 925 [2021-07-09 18:24:41,550 INFO L226 Difference]: Without dead ends: 909 [2021-07-09 18:24:41,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:24:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-07-09 18:24:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-07-09 18:24:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.180803571428571) internal successors, (3746), 896 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-07-09 18:24:41,562 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-07-09 18:24:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:41,562 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-07-09 18:24:41,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-07-09 18:24:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:41,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:41,564 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:41,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:41,764 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-07-09 18:24:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:41,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081815746] [2021-07-09 18:24:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081815746] [2021-07-09 18:24:41,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081815746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049384991] [2021-07-09 18:24:41,959 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:41,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:24:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:42,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049384991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:42,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:42,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:42,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19314694] [2021-07-09 18:24:42,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:42,596 INFO L87 Difference]: Start difference. First operand 897 states and 3746 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:43,180 INFO L93 Difference]: Finished difference Result 922 states and 3798 transitions. [2021-07-09 18:24:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:24:43,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:43,183 INFO L225 Difference]: With dead ends: 922 [2021-07-09 18:24:43,183 INFO L226 Difference]: Without dead ends: 908 [2021-07-09 18:24:43,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1004.0ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:24:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-07-09 18:24:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-07-09 18:24:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 4.180898876404495) internal successors, (3721), 890 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-07-09 18:24:43,195 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-07-09 18:24:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:43,195 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-07-09 18:24:43,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-07-09 18:24:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:43,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:43,196 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:43,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-07-09 18:24:43,397 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-07-09 18:24:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:43,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582948762] [2021-07-09 18:24:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:43,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582948762] [2021-07-09 18:24:43,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582948762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487443266] [2021-07-09 18:24:43,626 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:43,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:24:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:24:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:44,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487443266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:44,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:44,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:44,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972569636] [2021-07-09 18:24:44,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:44,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:44,485 INFO L87 Difference]: Start difference. First operand 891 states and 3721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:44,827 INFO L93 Difference]: Finished difference Result 933 states and 3816 transitions. [2021-07-09 18:24:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:24:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:44,829 INFO L225 Difference]: With dead ends: 933 [2021-07-09 18:24:44,829 INFO L226 Difference]: Without dead ends: 913 [2021-07-09 18:24:44,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:24:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-09 18:24:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-07-09 18:24:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.174746335963923) internal successors, (3703), 887 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-07-09 18:24:44,841 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-07-09 18:24:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:44,841 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-07-09 18:24:44,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-07-09 18:24:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:44,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:44,842 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:45,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:45,043 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-07-09 18:24:45,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:45,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916959032] [2021-07-09 18:24:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:45,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:45,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916959032] [2021-07-09 18:24:45,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916959032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:45,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612397458] [2021-07-09 18:24:45,144 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:45,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:24:45,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:24:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:45,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:45,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:45,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:45,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:45,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:45,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-07-09 18:24:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:45,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612397458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:45,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:45,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-07-09 18:24:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656910450] [2021-07-09 18:24:45,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:24:45,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:24:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:24:45,674 INFO L87 Difference]: Start difference. First operand 888 states and 3703 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:45,988 INFO L93 Difference]: Finished difference Result 1936 states and 7355 transitions. [2021-07-09 18:24:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:24:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:45,992 INFO L225 Difference]: With dead ends: 1936 [2021-07-09 18:24:45,992 INFO L226 Difference]: Without dead ends: 1912 [2021-07-09 18:24:45,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-07-09 18:24:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-07-09 18:24:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.211678832116788) internal successors, (4039), 959 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-07-09 18:24:46,010 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-07-09 18:24:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:46,010 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-07-09 18:24:46,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-07-09 18:24:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:46,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:46,012 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:46,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:46,212 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-07-09 18:24:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:46,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713666161] [2021-07-09 18:24:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:46,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:46,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713666161] [2021-07-09 18:24:46,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713666161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:46,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540018843] [2021-07-09 18:24:46,393 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:46,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:24:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540018843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:46,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:46,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454870401] [2021-07-09 18:24:46,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:46,849 INFO L87 Difference]: Start difference. First operand 960 states and 4039 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:47,249 INFO L93 Difference]: Finished difference Result 989 states and 4112 transitions. [2021-07-09 18:24:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:24:47,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:47,251 INFO L225 Difference]: With dead ends: 989 [2021-07-09 18:24:47,251 INFO L226 Difference]: Without dead ends: 982 [2021-07-09 18:24:47,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-09 18:24:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-07-09 18:24:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 4.19730010384216) internal successors, (4042), 963 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-07-09 18:24:47,264 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-07-09 18:24:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:47,264 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-07-09 18:24:47,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-07-09 18:24:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:47,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:47,266 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:47,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-09 18:24:47,466 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-07-09 18:24:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095787609] [2021-07-09 18:24:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:47,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:47,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095787609] [2021-07-09 18:24:47,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095787609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:47,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123330324] [2021-07-09 18:24:47,591 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:47,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:24:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:47,992 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-09 18:24:48,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:48,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:48,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:48,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:48,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:24:48,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:48,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2021-07-09 18:24:48,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-07-09 18:24:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:48,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123330324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:48,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:48,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-09 18:24:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994115979] [2021-07-09 18:24:48,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:24:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:24:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:24:48,290 INFO L87 Difference]: Start difference. First operand 964 states and 4042 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,729 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 18:24:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:54,793 INFO L93 Difference]: Finished difference Result 1301 states and 5054 transitions. [2021-07-09 18:24:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:24:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:54,796 INFO L225 Difference]: With dead ends: 1301 [2021-07-09 18:24:54,796 INFO L226 Difference]: Without dead ends: 1282 [2021-07-09 18:24:54,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2741.3ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:24:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-09 18:24:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1004. [2021-07-09 18:24:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.161515453639082) internal successors, (4174), 1003 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-07-09 18:24:54,811 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-07-09 18:24:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:54,811 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-07-09 18:24:54,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-07-09 18:24:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:54,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:54,812 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:55,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:24:55,013 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-07-09 18:24:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:55,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641004274] [2021-07-09 18:24:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:55,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:55,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641004274] [2021-07-09 18:24:55,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641004274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:55,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889845943] [2021-07-09 18:24:55,184 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:55,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:24:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:24:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:55,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889845943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:55,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:55,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:55,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106362525] [2021-07-09 18:24:55,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:55,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:55,739 INFO L87 Difference]: Start difference. First operand 1004 states and 4174 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:56,196 INFO L93 Difference]: Finished difference Result 1036 states and 4233 transitions. [2021-07-09 18:24:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:24:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:56,198 INFO L225 Difference]: With dead ends: 1036 [2021-07-09 18:24:56,198 INFO L226 Difference]: Without dead ends: 1018 [2021-07-09 18:24:56,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:24:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-07-09 18:24:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-07-09 18:24:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.161616161616162) internal successors, (4120), 990 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-07-09 18:24:56,211 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-07-09 18:24:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:56,211 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-07-09 18:24:56,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-07-09 18:24:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:56,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:56,213 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:56,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-09 18:24:56,414 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-07-09 18:24:56,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:56,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21690857] [2021-07-09 18:24:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21690857] [2021-07-09 18:24:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21690857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81092759] [2021-07-09 18:24:56,590 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:56,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:24:56,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:57,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81092759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:57,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:57,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:57,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236872989] [2021-07-09 18:24:57,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:57,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:57,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:57,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:57,219 INFO L87 Difference]: Start difference. First operand 991 states and 4120 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:57,606 INFO L93 Difference]: Finished difference Result 1016 states and 4172 transitions. [2021-07-09 18:24:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:24:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:57,608 INFO L225 Difference]: With dead ends: 1016 [2021-07-09 18:24:57,608 INFO L226 Difference]: Without dead ends: 1002 [2021-07-09 18:24:57,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 875.8ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-07-09 18:24:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-07-09 18:24:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 4.156028368794326) internal successors, (4102), 987 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-07-09 18:24:57,622 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-07-09 18:24:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:57,622 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-07-09 18:24:57,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-07-09 18:24:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:57,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:57,623 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:57,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:57,824 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-07-09 18:24:57,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:57,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799321845] [2021-07-09 18:24:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:57,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:57,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799321845] [2021-07-09 18:24:57,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799321845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:57,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302914680] [2021-07-09 18:24:57,992 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:58,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:24:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:24:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:58,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302914680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:58,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:58,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:58,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554877715] [2021-07-09 18:24:58,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:58,600 INFO L87 Difference]: Start difference. First operand 988 states and 4102 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:58,879 INFO L93 Difference]: Finished difference Result 959 states and 3842 transitions. [2021-07-09 18:24:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:24:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:24:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:58,881 INFO L225 Difference]: With dead ends: 959 [2021-07-09 18:24:58,881 INFO L226 Difference]: Without dead ends: 939 [2021-07-09 18:24:58,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:24:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-09 18:24:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-07-09 18:24:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.077257889009793) internal successors, (3747), 919 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-07-09 18:24:58,893 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-07-09 18:24:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:58,893 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-07-09 18:24:58,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-07-09 18:24:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:24:58,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:58,895 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:59,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-09 18:24:59,096 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-07-09 18:24:59,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:59,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429049293] [2021-07-09 18:24:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:59,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429049293] [2021-07-09 18:24:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429049293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257834342] [2021-07-09 18:24:59,294 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:59,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:24:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:24:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:59,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257834342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:59,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:59,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:24:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163061390] [2021-07-09 18:24:59,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:24:59,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:24:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:24:59,917 INFO L87 Difference]: Start difference. First operand 920 states and 3747 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:00,252 INFO L93 Difference]: Finished difference Result 963 states and 3864 transitions. [2021-07-09 18:25:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:25:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:00,255 INFO L225 Difference]: With dead ends: 963 [2021-07-09 18:25:00,255 INFO L226 Difference]: Without dead ends: 956 [2021-07-09 18:25:00,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-09 18:25:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-07-09 18:25:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 4.049092849519744) internal successors, (3794), 937 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-07-09 18:25:00,267 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-07-09 18:25:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:00,267 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-07-09 18:25:00,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-07-09 18:25:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:00,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:00,269 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:00,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:00,470 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-07-09 18:25:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:00,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5574269] [2021-07-09 18:25:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:00,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5574269] [2021-07-09 18:25:00,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5574269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896102594] [2021-07-09 18:25:00,645 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:25:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:01,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:01,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:01,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:01,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:01,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:01,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:01,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 18:25:01,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-07-09 18:25:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:01,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896102594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:01,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:01,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-07-09 18:25:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063185612] [2021-07-09 18:25:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:25:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:25:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:25:01,244 INFO L87 Difference]: Start difference. First operand 938 states and 3794 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:05,518 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-09 18:25:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:05,854 INFO L93 Difference]: Finished difference Result 3046 states and 12070 transitions. [2021-07-09 18:25:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:25:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:05,861 INFO L225 Difference]: With dead ends: 3046 [2021-07-09 18:25:05,862 INFO L226 Difference]: Without dead ends: 3001 [2021-07-09 18:25:05,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4755.5ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-07-09 18:25:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-07-09 18:25:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 4.475931677018633) internal successors, (5765), 1288 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-07-09 18:25:05,892 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-07-09 18:25:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:05,892 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-07-09 18:25:05,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-07-09 18:25:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:05,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:05,894 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-09 18:25:06,095 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-07-09 18:25:06,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:06,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103542773] [2021-07-09 18:25:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:06,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103542773] [2021-07-09 18:25:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103542773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:06,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711139321] [2021-07-09 18:25:06,301 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:06,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711139321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:06,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:06,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:06,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445987108] [2021-07-09 18:25:06,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:06,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:06,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:06,908 INFO L87 Difference]: Start difference. First operand 1289 states and 5765 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:07,323 INFO L93 Difference]: Finished difference Result 1336 states and 5880 transitions. [2021-07-09 18:25:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:25:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:07,326 INFO L225 Difference]: With dead ends: 1336 [2021-07-09 18:25:07,326 INFO L226 Difference]: Without dead ends: 1318 [2021-07-09 18:25:07,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-09 18:25:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-07-09 18:25:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.472501936483346) internal successors, (5774), 1291 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-07-09 18:25:07,344 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-07-09 18:25:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:07,344 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-07-09 18:25:07,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-07-09 18:25:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:07,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:07,347 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:07,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:07,547 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-07-09 18:25:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:07,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290523795] [2021-07-09 18:25:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:07,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290523795] [2021-07-09 18:25:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290523795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584615974] [2021-07-09 18:25:07,702 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:07,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:25:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:25:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:08,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:08,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:08,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:08,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:08,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:25:08,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-09 18:25:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584615974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:08,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:08,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-07-09 18:25:08,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748643387] [2021-07-09 18:25:08,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:25:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:25:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:25:08,220 INFO L87 Difference]: Start difference. First operand 1292 states and 5774 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:08,750 INFO L93 Difference]: Finished difference Result 3442 states and 14583 transitions. [2021-07-09 18:25:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:25:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:08,759 INFO L225 Difference]: With dead ends: 3442 [2021-07-09 18:25:08,759 INFO L226 Difference]: Without dead ends: 3422 [2021-07-09 18:25:08,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-07-09 18:25:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-07-09 18:25:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 4.708386277001271) internal successors, (7411), 1574 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-07-09 18:25:08,797 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-07-09 18:25:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:08,797 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-07-09 18:25:08,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-07-09 18:25:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:08,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:08,800 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:09,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:09,000 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-07-09 18:25:09,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:09,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674406204] [2021-07-09 18:25:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:09,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674406204] [2021-07-09 18:25:09,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674406204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:09,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472820025] [2021-07-09 18:25:09,190 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:09,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:09,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472820025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:09,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:09,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:09,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324581340] [2021-07-09 18:25:09,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:09,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:09,665 INFO L87 Difference]: Start difference. First operand 1575 states and 7411 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:10,119 INFO L93 Difference]: Finished difference Result 1607 states and 7481 transitions. [2021-07-09 18:25:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:10,123 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 18:25:10,123 INFO L226 Difference]: Without dead ends: 1593 [2021-07-09 18:25:10,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-07-09 18:25:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-07-09 18:25:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.707829408020369) internal successors, (7396), 1571 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-07-09 18:25:10,146 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-07-09 18:25:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:10,146 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-07-09 18:25:10,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-07-09 18:25:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:10,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:10,149 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:10,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-09 18:25:10,349 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-07-09 18:25:10,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:10,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643660651] [2021-07-09 18:25:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:10,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:10,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643660651] [2021-07-09 18:25:10,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643660651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:10,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497331309] [2021-07-09 18:25:10,570 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:10,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:25:10,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497331309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135554730] [2021-07-09 18:25:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:11,214 INFO L87 Difference]: Start difference. First operand 1572 states and 7396 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:11,509 INFO L93 Difference]: Finished difference Result 1596 states and 7442 transitions. [2021-07-09 18:25:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:25:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:11,513 INFO L225 Difference]: With dead ends: 1596 [2021-07-09 18:25:11,513 INFO L226 Difference]: Without dead ends: 1577 [2021-07-09 18:25:11,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-07-09 18:25:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-07-09 18:25:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.732558139534884) internal successors, (7326), 1548 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-07-09 18:25:11,537 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-07-09 18:25:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:11,537 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-07-09 18:25:11,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-07-09 18:25:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:11,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:11,540 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:11,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:11,740 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-07-09 18:25:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:11,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344310494] [2021-07-09 18:25:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:11,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:11,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344310494] [2021-07-09 18:25:11,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344310494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:11,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623728632] [2021-07-09 18:25:11,939 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:11,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:25:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:12,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:12,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:12,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:12,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:12,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:12,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:12,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:12,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:12,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:12,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:25:12,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:133, output treesize:105 [2021-07-09 18:25:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:12,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623728632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:12,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:12,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-07-09 18:25:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575577083] [2021-07-09 18:25:12,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:12,719 INFO L87 Difference]: Start difference. First operand 1549 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:13,425 INFO L93 Difference]: Finished difference Result 1650 states and 7580 transitions. [2021-07-09 18:25:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:13,429 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 18:25:13,429 INFO L226 Difference]: Without dead ends: 1642 [2021-07-09 18:25:13,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1100.5ms TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:25:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-09 18:25:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1549. [2021-07-09 18:25:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.715762273901809) internal successors, (7300), 1548 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7300 transitions. [2021-07-09 18:25:13,453 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7300 transitions. Word has length 27 [2021-07-09 18:25:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:13,453 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7300 transitions. [2021-07-09 18:25:13,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7300 transitions. [2021-07-09 18:25:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:13,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:13,455 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:13,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:13,656 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1358794172, now seen corresponding path program 127 times [2021-07-09 18:25:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:13,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925388384] [2021-07-09 18:25:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:13,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:13,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925388384] [2021-07-09 18:25:13,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925388384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:13,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333567173] [2021-07-09 18:25:13,823 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:13,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:14,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333567173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:14,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:14,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378866722] [2021-07-09 18:25:14,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:14,469 INFO L87 Difference]: Start difference. First operand 1549 states and 7300 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:14,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:14,762 INFO L93 Difference]: Finished difference Result 1575 states and 7357 transitions. [2021-07-09 18:25:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:25:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:14,766 INFO L225 Difference]: With dead ends: 1575 [2021-07-09 18:25:14,766 INFO L226 Difference]: Without dead ends: 1559 [2021-07-09 18:25:14,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 738.1ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-09 18:25:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1542. [2021-07-09 18:25:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.720960415314731) internal successors, (7275), 1541 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 7275 transitions. [2021-07-09 18:25:14,789 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 7275 transitions. Word has length 27 [2021-07-09 18:25:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:14,789 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 7275 transitions. [2021-07-09 18:25:14,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 7275 transitions. [2021-07-09 18:25:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:14,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:14,792 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:14,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-07-09 18:25:14,993 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1617589496, now seen corresponding path program 128 times [2021-07-09 18:25:14,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:14,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391218818] [2021-07-09 18:25:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:15,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:15,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391218818] [2021-07-09 18:25:15,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391218818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:15,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325031014] [2021-07-09 18:25:15,239 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:15,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:15,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:15,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:25:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:15,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325031014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:15,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:15,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116116683] [2021-07-09 18:25:15,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:15,970 INFO L87 Difference]: Start difference. First operand 1542 states and 7275 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:16,360 INFO L93 Difference]: Finished difference Result 1472 states and 6714 transitions. [2021-07-09 18:25:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:25:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:16,363 INFO L225 Difference]: With dead ends: 1472 [2021-07-09 18:25:16,363 INFO L226 Difference]: Without dead ends: 1458 [2021-07-09 18:25:16,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-07-09 18:25:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1437. [2021-07-09 18:25:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 4.616295264623956) internal successors, (6629), 1436 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 6629 transitions. [2021-07-09 18:25:16,384 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 6629 transitions. Word has length 27 [2021-07-09 18:25:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:16,384 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 6629 transitions. [2021-07-09 18:25:16,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 6629 transitions. [2021-07-09 18:25:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:16,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:16,387 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:16,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:16,588 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1348843068, now seen corresponding path program 129 times [2021-07-09 18:25:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829532597] [2021-07-09 18:25:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:16,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829532597] [2021-07-09 18:25:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829532597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036632136] [2021-07-09 18:25:16,775 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:25:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:17,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036632136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:17,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:17,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389888222] [2021-07-09 18:25:17,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:17,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:17,648 INFO L87 Difference]: Start difference. First operand 1437 states and 6629 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:18,028 INFO L93 Difference]: Finished difference Result 1273 states and 5538 transitions. [2021-07-09 18:25:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:25:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:18,031 INFO L225 Difference]: With dead ends: 1273 [2021-07-09 18:25:18,031 INFO L226 Difference]: Without dead ends: 1251 [2021-07-09 18:25:18,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 974.5ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-07-09 18:25:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1232. [2021-07-09 18:25:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.418359057676685) internal successors, (5439), 1231 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5439 transitions. [2021-07-09 18:25:18,048 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5439 transitions. Word has length 27 [2021-07-09 18:25:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:18,048 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5439 transitions. [2021-07-09 18:25:18,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5439 transitions. [2021-07-09 18:25:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:18,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:18,051 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:18,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-09 18:25:18,251 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -133551674, now seen corresponding path program 130 times [2021-07-09 18:25:18,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:18,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525695731] [2021-07-09 18:25:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:18,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525695731] [2021-07-09 18:25:18,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525695731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:18,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325305420] [2021-07-09 18:25:18,466 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:18,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:25:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:18,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:18,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:18,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:18,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:18,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:18,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:25:18,848 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-09 18:25:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:18,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325305420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:18,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:18,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-07-09 18:25:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208631145] [2021-07-09 18:25:18,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:25:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:25:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:25:18,953 INFO L87 Difference]: Start difference. First operand 1232 states and 5439 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:19,465 INFO L93 Difference]: Finished difference Result 2587 states and 10394 transitions. [2021-07-09 18:25:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:25:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:19,471 INFO L225 Difference]: With dead ends: 2587 [2021-07-09 18:25:19,471 INFO L226 Difference]: Without dead ends: 2542 [2021-07-09 18:25:19,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-09 18:25:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1419. [2021-07-09 18:25:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 4.562059238363893) internal successors, (6469), 1418 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 6469 transitions. [2021-07-09 18:25:19,499 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 6469 transitions. Word has length 27 [2021-07-09 18:25:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:19,500 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 6469 transitions. [2021-07-09 18:25:19,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 6469 transitions. [2021-07-09 18:25:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:19,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:19,502 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:19,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:19,703 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1158265598, now seen corresponding path program 131 times [2021-07-09 18:25:19,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:19,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706026123] [2021-07-09 18:25:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:19,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:19,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706026123] [2021-07-09 18:25:19,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706026123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:19,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703755201] [2021-07-09 18:25:19,865 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:19,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:25:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:20,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703755201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:20,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:20,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:20,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746540492] [2021-07-09 18:25:20,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:20,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:20,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:20,632 INFO L87 Difference]: Start difference. First operand 1419 states and 6469 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:20,811 INFO L93 Difference]: Finished difference Result 1448 states and 6542 transitions. [2021-07-09 18:25:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:20,815 INFO L225 Difference]: With dead ends: 1448 [2021-07-09 18:25:20,815 INFO L226 Difference]: Without dead ends: 1440 [2021-07-09 18:25:20,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 733.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-07-09 18:25:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1417. [2021-07-09 18:25:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 4.562146892655368) internal successors, (6460), 1416 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 6460 transitions. [2021-07-09 18:25:20,835 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 6460 transitions. Word has length 27 [2021-07-09 18:25:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:20,835 INFO L482 AbstractCegarLoop]: Abstraction has 1417 states and 6460 transitions. [2021-07-09 18:25:20,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 6460 transitions. [2021-07-09 18:25:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:20,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:20,838 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:21,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-09 18:25:21,038 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash -664653662, now seen corresponding path program 132 times [2021-07-09 18:25:21,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:21,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207546758] [2021-07-09 18:25:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:21,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207546758] [2021-07-09 18:25:21,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207546758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023797633] [2021-07-09 18:25:21,167 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:21,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:25:21,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:21,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:21,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:21,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:21,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-07-09 18:25:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023797633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:21,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-07-09 18:25:21,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222805885] [2021-07-09 18:25:21,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:21,889 INFO L87 Difference]: Start difference. First operand 1417 states and 6460 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:22,213 INFO L93 Difference]: Finished difference Result 1648 states and 7113 transitions. [2021-07-09 18:25:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:25:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:22,217 INFO L225 Difference]: With dead ends: 1648 [2021-07-09 18:25:22,217 INFO L226 Difference]: Without dead ends: 1628 [2021-07-09 18:25:22,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 785.2ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-09 18:25:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1436. [2021-07-09 18:25:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 4.559581881533101) internal successors, (6543), 1435 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 6543 transitions. [2021-07-09 18:25:22,239 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 6543 transitions. Word has length 27 [2021-07-09 18:25:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:22,239 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 6543 transitions. [2021-07-09 18:25:22,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 6543 transitions. [2021-07-09 18:25:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:22,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:22,241 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:22,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:22,442 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:22,443 INFO L82 PathProgramCache]: Analyzing trace with hash -267499616, now seen corresponding path program 133 times [2021-07-09 18:25:22,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:22,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861583475] [2021-07-09 18:25:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:22,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:22,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861583475] [2021-07-09 18:25:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861583475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:22,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142581470] [2021-07-09 18:25:22,686 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:23,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142581470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:23,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:23,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:23,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843859184] [2021-07-09 18:25:23,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:23,436 INFO L87 Difference]: Start difference. First operand 1436 states and 6543 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:23,967 INFO L93 Difference]: Finished difference Result 1480 states and 6651 transitions. [2021-07-09 18:25:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:25:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:23,971 INFO L225 Difference]: With dead ends: 1480 [2021-07-09 18:25:23,971 INFO L226 Difference]: Without dead ends: 1464 [2021-07-09 18:25:23,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1075.0ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:25:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-09 18:25:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1441. [2021-07-09 18:25:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.552777777777778) internal successors, (6556), 1440 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6556 transitions. [2021-07-09 18:25:23,994 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6556 transitions. Word has length 27 [2021-07-09 18:25:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:23,994 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6556 transitions. [2021-07-09 18:25:23,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6556 transitions. [2021-07-09 18:25:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:23,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:23,996 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:24,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:24,197 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1700897470, now seen corresponding path program 134 times [2021-07-09 18:25:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:24,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360328498] [2021-07-09 18:25:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:24,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:24,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360328498] [2021-07-09 18:25:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360328498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:24,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126791203] [2021-07-09 18:25:24,412 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:24,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:24,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:24,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:25,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126791203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:25,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:25,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32691384] [2021-07-09 18:25:25,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:25,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:25,116 INFO L87 Difference]: Start difference. First operand 1441 states and 6556 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:25,599 INFO L93 Difference]: Finished difference Result 1485 states and 6664 transitions. [2021-07-09 18:25:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:25:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:25,602 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 18:25:25,602 INFO L226 Difference]: Without dead ends: 1469 [2021-07-09 18:25:25,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-07-09 18:25:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1441. [2021-07-09 18:25:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.551388888888889) internal successors, (6554), 1440 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6554 transitions. [2021-07-09 18:25:25,623 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6554 transitions. Word has length 27 [2021-07-09 18:25:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:25,623 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6554 transitions. [2021-07-09 18:25:25,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6554 transitions. [2021-07-09 18:25:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:25,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:25,625 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:25,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 18:25:25,826 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash -724293666, now seen corresponding path program 135 times [2021-07-09 18:25:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:25,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367276888] [2021-07-09 18:25:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:25,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:25,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367276888] [2021-07-09 18:25:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367276888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993287560] [2021-07-09 18:25:25,971 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:26,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:25:26,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:26,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:25:26,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:26,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:26,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:26,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:26,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:26,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:25:26,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:71 [2021-07-09 18:25:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993287560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:26,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:26,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-07-09 18:25:26,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285057951] [2021-07-09 18:25:26,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:25:26,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:26,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:25:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:25:26,448 INFO L87 Difference]: Start difference. First operand 1441 states and 6554 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:27,131 INFO L93 Difference]: Finished difference Result 2434 states and 10147 transitions. [2021-07-09 18:25:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:25:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:27,137 INFO L225 Difference]: With dead ends: 2434 [2021-07-09 18:25:27,137 INFO L226 Difference]: Without dead ends: 2415 [2021-07-09 18:25:27,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 699.5ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-09 18:25:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1570. [2021-07-09 18:25:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 4.625239005736137) internal successors, (7257), 1569 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 7257 transitions. [2021-07-09 18:25:27,167 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 7257 transitions. Word has length 27 [2021-07-09 18:25:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:27,167 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 7257 transitions. [2021-07-09 18:25:27,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 7257 transitions. [2021-07-09 18:25:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:27,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:27,170 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-09 18:25:27,370 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1399100484, now seen corresponding path program 136 times [2021-07-09 18:25:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:27,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415271375] [2021-07-09 18:25:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:27,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:27,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415271375] [2021-07-09 18:25:27,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415271375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:27,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118996166] [2021-07-09 18:25:27,570 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:27,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:27,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:28,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118996166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:28,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:28,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:28,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083584931] [2021-07-09 18:25:28,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:28,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:28,179 INFO L87 Difference]: Start difference. First operand 1570 states and 7257 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:28,564 INFO L93 Difference]: Finished difference Result 1530 states and 6921 transitions. [2021-07-09 18:25:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:25:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:28,567 INFO L225 Difference]: With dead ends: 1530 [2021-07-09 18:25:28,567 INFO L226 Difference]: Without dead ends: 1516 [2021-07-09 18:25:28,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-09 18:25:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1499. [2021-07-09 18:25:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 4.568758344459279) internal successors, (6844), 1498 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 6844 transitions. [2021-07-09 18:25:28,589 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 6844 transitions. Word has length 27 [2021-07-09 18:25:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:28,590 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 6844 transitions. [2021-07-09 18:25:28,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 6844 transitions. [2021-07-09 18:25:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:28,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:28,592 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:28,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-07-09 18:25:28,793 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1667846912, now seen corresponding path program 137 times [2021-07-09 18:25:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:28,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102109829] [2021-07-09 18:25:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:28,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102109829] [2021-07-09 18:25:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102109829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028193672] [2021-07-09 18:25:28,967 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:29,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:25:29,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:25:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:29,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028193672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:29,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:29,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:29,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450123794] [2021-07-09 18:25:29,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:29,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:29,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:29,642 INFO L87 Difference]: Start difference. First operand 1499 states and 6844 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:29,820 INFO L93 Difference]: Finished difference Result 1529 states and 6905 transitions. [2021-07-09 18:25:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:25:29,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:29,830 INFO L225 Difference]: With dead ends: 1529 [2021-07-09 18:25:29,830 INFO L226 Difference]: Without dead ends: 1511 [2021-07-09 18:25:29,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-07-09 18:25:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1483. [2021-07-09 18:25:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.582321187584346) internal successors, (6791), 1482 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6791 transitions. [2021-07-09 18:25:29,892 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6791 transitions. Word has length 27 [2021-07-09 18:25:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 6791 transitions. [2021-07-09 18:25:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6791 transitions. [2021-07-09 18:25:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:29,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:29,896 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:30,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:30,109 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1070450466, now seen corresponding path program 138 times [2021-07-09 18:25:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:30,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987608869] [2021-07-09 18:25:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:25:30,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987608869] [2021-07-09 18:25:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987608869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399239511] [2021-07-09 18:25:30,240 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:30,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:25:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:30,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:30,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:30,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:25:30,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:30,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:30,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:30,959 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-07-09 18:25:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399239511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:31,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-07-09 18:25:31,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103728900] [2021-07-09 18:25:31,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:31,015 INFO L87 Difference]: Start difference. First operand 1483 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:31,466 INFO L93 Difference]: Finished difference Result 2432 states and 10217 transitions. [2021-07-09 18:25:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:25:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:31,475 INFO L225 Difference]: With dead ends: 2432 [2021-07-09 18:25:31,476 INFO L226 Difference]: Without dead ends: 2404 [2021-07-09 18:25:31,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:25:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-09 18:25:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1620. [2021-07-09 18:25:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.625077208153181) internal successors, (7488), 1619 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7488 transitions. [2021-07-09 18:25:31,527 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7488 transitions. Word has length 27 [2021-07-09 18:25:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:31,527 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 7488 transitions. [2021-07-09 18:25:31,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7488 transitions. [2021-07-09 18:25:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:31,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:31,531 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:31,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-09 18:25:31,745 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash 175326052, now seen corresponding path program 139 times [2021-07-09 18:25:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503619636] [2021-07-09 18:25:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503619636] [2021-07-09 18:25:31,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503619636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662019019] [2021-07-09 18:25:31,917 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:25:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:32,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662019019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:32,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:32,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839014430] [2021-07-09 18:25:32,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:32,652 INFO L87 Difference]: Start difference. First operand 1620 states and 7488 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:33,266 INFO L93 Difference]: Finished difference Result 1647 states and 7547 transitions. [2021-07-09 18:25:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:25:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:33,274 INFO L225 Difference]: With dead ends: 1647 [2021-07-09 18:25:33,274 INFO L226 Difference]: Without dead ends: 1633 [2021-07-09 18:25:33,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1079.9ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-07-09 18:25:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1612. [2021-07-09 18:25:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 4.631905648665425) internal successors, (7462), 1611 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7462 transitions. [2021-07-09 18:25:33,312 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7462 transitions. Word has length 27 [2021-07-09 18:25:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:33,312 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 7462 transitions. [2021-07-09 18:25:33,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7462 transitions. [2021-07-09 18:25:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:25:33,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:33,316 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:33,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:33,537 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash -673296420, now seen corresponding path program 140 times [2021-07-09 18:25:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016502999] [2021-07-09 18:25:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:33,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016502999] [2021-07-09 18:25:33,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016502999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220425563] [2021-07-09 18:25:33,889 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:33,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:33,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220425563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:34,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:34,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:25:34,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066286684] [2021-07-09 18:25:34,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:34,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:34,455 INFO L87 Difference]: Start difference. First operand 1612 states and 7462 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:34,962 INFO L93 Difference]: Finished difference Result 1632 states and 7497 transitions. [2021-07-09 18:25:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:25:34,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:25:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:34,967 INFO L225 Difference]: With dead ends: 1632 [2021-07-09 18:25:34,967 INFO L226 Difference]: Without dead ends: 1614 [2021-07-09 18:25:34,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:25:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-09 18:25:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1586. [2021-07-09 18:25:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 4.6574132492113565) internal successors, (7382), 1585 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 7382 transitions. [2021-07-09 18:25:35,000 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 7382 transitions. Word has length 27 [2021-07-09 18:25:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:35,000 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 7382 transitions. [2021-07-09 18:25:35,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 7382 transitions. [2021-07-09 18:25:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:35,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:35,004 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:35,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:35,205 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1068054097, now seen corresponding path program 141 times [2021-07-09 18:25:35,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:35,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925363688] [2021-07-09 18:25:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:35,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:35,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925363688] [2021-07-09 18:25:35,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925363688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:35,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119150940] [2021-07-09 18:25:35,428 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:35,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:25:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:25:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:36,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119150940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:36,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:36,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834590413] [2021-07-09 18:25:36,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:36,444 INFO L87 Difference]: Start difference. First operand 1586 states and 7382 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:37,036 INFO L93 Difference]: Finished difference Result 1626 states and 7470 transitions. [2021-07-09 18:25:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:37,042 INFO L225 Difference]: With dead ends: 1626 [2021-07-09 18:25:37,042 INFO L226 Difference]: Without dead ends: 1622 [2021-07-09 18:25:37,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1409.9ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:25:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-07-09 18:25:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1600. [2021-07-09 18:25:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 4.632895559724828) internal successors, (7408), 1599 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 7408 transitions. [2021-07-09 18:25:37,073 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 7408 transitions. Word has length 28 [2021-07-09 18:25:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:37,073 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 7408 transitions. [2021-07-09 18:25:37,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 7408 transitions. [2021-07-09 18:25:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:37,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:37,077 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:37,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:37,293 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1313380425, now seen corresponding path program 142 times [2021-07-09 18:25:37,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:37,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183663116] [2021-07-09 18:25:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:37,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183663116] [2021-07-09 18:25:37,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183663116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263703124] [2021-07-09 18:25:37,632 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:37,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:37,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:38,208 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:25:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:38,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263703124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:38,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:38,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826285246] [2021-07-09 18:25:38,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:38,519 INFO L87 Difference]: Start difference. First operand 1600 states and 7408 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:39,162 INFO L93 Difference]: Finished difference Result 1634 states and 7482 transitions. [2021-07-09 18:25:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:25:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:39,168 INFO L225 Difference]: With dead ends: 1634 [2021-07-09 18:25:39,168 INFO L226 Difference]: Without dead ends: 1630 [2021-07-09 18:25:39,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1383.7ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:25:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-07-09 18:25:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1604. [2021-07-09 18:25:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 4.625077978789769) internal successors, (7414), 1603 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 7414 transitions. [2021-07-09 18:25:39,204 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 7414 transitions. Word has length 28 [2021-07-09 18:25:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:39,204 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 7414 transitions. [2021-07-09 18:25:39,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 7414 transitions. [2021-07-09 18:25:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:39,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:39,208 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:39,421 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 775887569, now seen corresponding path program 143 times [2021-07-09 18:25:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784544286] [2021-07-09 18:25:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:39,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784544286] [2021-07-09 18:25:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784544286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984712331] [2021-07-09 18:25:39,703 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:39,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:25:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:40,272 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:25:40,424 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:25:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:40,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984712331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:40,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:40,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:40,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499819592] [2021-07-09 18:25:40,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:40,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:40,754 INFO L87 Difference]: Start difference. First operand 1604 states and 7414 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:41,161 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-07-09 18:25:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:25:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:41,168 INFO L225 Difference]: With dead ends: 1651 [2021-07-09 18:25:41,168 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 18:25:41,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1281.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:25:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 18:25:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1616. [2021-07-09 18:25:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 4.610526315789474) internal successors, (7446), 1615 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 7446 transitions. [2021-07-09 18:25:41,203 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 7446 transitions. Word has length 28 [2021-07-09 18:25:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:41,203 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 7446 transitions. [2021-07-09 18:25:41,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 7446 transitions. [2021-07-09 18:25:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:41,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:41,207 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:41,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-07-09 18:25:41,429 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash -72733363, now seen corresponding path program 144 times [2021-07-09 18:25:41,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:41,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062709522] [2021-07-09 18:25:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:41,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062709522] [2021-07-09 18:25:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062709522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753948630] [2021-07-09 18:25:41,735 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:41,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:25:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:42,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753948630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:42,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:42,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720318616] [2021-07-09 18:25:42,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:42,518 INFO L87 Difference]: Start difference. First operand 1616 states and 7446 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:43,420 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-07-09 18:25:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:25:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:43,425 INFO L225 Difference]: With dead ends: 1651 [2021-07-09 18:25:43,425 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 18:25:43,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1522.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:25:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 18:25:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1617. [2021-07-09 18:25:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.608292079207921) internal successors, (7447), 1616 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7447 transitions. [2021-07-09 18:25:43,453 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7447 transitions. Word has length 28 [2021-07-09 18:25:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:43,453 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7447 transitions. [2021-07-09 18:25:43,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7447 transitions. [2021-07-09 18:25:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:43,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:43,456 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:43,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-09 18:25:43,657 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655091, now seen corresponding path program 145 times [2021-07-09 18:25:43,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:43,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784466359] [2021-07-09 18:25:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:43,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:43,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784466359] [2021-07-09 18:25:43,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784466359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:43,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536996897] [2021-07-09 18:25:43,962 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:44,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536996897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:44,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:44,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:44,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330855754] [2021-07-09 18:25:44,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:44,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:44,739 INFO L87 Difference]: Start difference. First operand 1617 states and 7447 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:45,297 INFO L93 Difference]: Finished difference Result 1661 states and 7546 transitions. [2021-07-09 18:25:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:25:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:45,301 INFO L225 Difference]: With dead ends: 1661 [2021-07-09 18:25:45,301 INFO L226 Difference]: Without dead ends: 1657 [2021-07-09 18:25:45,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1224.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:25:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-09 18:25:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1613. [2021-07-09 18:25:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.61166253101737) internal successors, (7434), 1612 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 7434 transitions. [2021-07-09 18:25:45,324 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 7434 transitions. Word has length 28 [2021-07-09 18:25:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:45,324 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 7434 transitions. [2021-07-09 18:25:45,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 7434 transitions. [2021-07-09 18:25:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:45,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:45,327 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:45,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-09 18:25:45,530 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1997787763, now seen corresponding path program 146 times [2021-07-09 18:25:45,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:45,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892839325] [2021-07-09 18:25:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:45,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892839325] [2021-07-09 18:25:45,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892839325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520065022] [2021-07-09 18:25:45,809 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:46,358 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 18:25:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:46,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520065022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:46,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:46,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:25:46,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94489750] [2021-07-09 18:25:46,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:46,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:46,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:46,750 INFO L87 Difference]: Start difference. First operand 1613 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:47,205 INFO L93 Difference]: Finished difference Result 1648 states and 7509 transitions. [2021-07-09 18:25:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:25:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:47,209 INFO L225 Difference]: With dead ends: 1648 [2021-07-09 18:25:47,209 INFO L226 Difference]: Without dead ends: 1644 [2021-07-09 18:25:47,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1295.9ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:25:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-07-09 18:25:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1618. [2021-07-09 18:25:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.6017316017316015) internal successors, (7441), 1617 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7441 transitions. [2021-07-09 18:25:47,233 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7441 transitions. Word has length 28 [2021-07-09 18:25:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:47,233 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7441 transitions. [2021-07-09 18:25:47,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7441 transitions. [2021-07-09 18:25:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:47,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:47,236 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:47,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:47,437 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2038384209, now seen corresponding path program 147 times [2021-07-09 18:25:47,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:47,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930474594] [2021-07-09 18:25:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:47,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:47,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930474594] [2021-07-09 18:25:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930474594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:47,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406391631] [2021-07-09 18:25:47,643 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:47,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:25:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:25:47,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:48,098 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:25:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406391631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:25:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214345626] [2021-07-09 18:25:48,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:48,464 INFO L87 Difference]: Start difference. First operand 1618 states and 7441 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:48,898 INFO L93 Difference]: Finished difference Result 1653 states and 7516 transitions. [2021-07-09 18:25:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:25:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:25:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:48,902 INFO L225 Difference]: With dead ends: 1653 [2021-07-09 18:25:48,902 INFO L226 Difference]: Without dead ends: 1649 [2021-07-09 18:25:48,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:25:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-07-09 18:25:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1617. [2021-07-09 18:25:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.600866336633663) internal successors, (7435), 1616 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7435 transitions. [2021-07-09 18:25:48,944 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7435 transitions. Word has length 28 [2021-07-09 18:25:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:48,944 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7435 transitions. [2021-07-09 18:25:48,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7435 transitions. [2021-07-09 18:25:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:48,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:48,947 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:49,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:49,147 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash 232467601, now seen corresponding path program 148 times [2021-07-09 18:25:49,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:49,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775298542] [2021-07-09 18:25:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775298542] [2021-07-09 18:25:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775298542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150717361] [2021-07-09 18:25:49,375 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:49,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:49,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:49,838 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:25:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:50,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150717361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:50,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:50,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146923480] [2021-07-09 18:25:50,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:50,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:50,176 INFO L87 Difference]: Start difference. First operand 1617 states and 7435 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:50,694 INFO L93 Difference]: Finished difference Result 1656 states and 7522 transitions. [2021-07-09 18:25:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:25:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:50,698 INFO L225 Difference]: With dead ends: 1656 [2021-07-09 18:25:50,698 INFO L226 Difference]: Without dead ends: 1652 [2021-07-09 18:25:50,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1121.5ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:25:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-09 18:25:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1622. [2021-07-09 18:25:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.592227020357804) internal successors, (7444), 1621 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7444 transitions. [2021-07-09 18:25:50,722 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7444 transitions. Word has length 28 [2021-07-09 18:25:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:50,722 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7444 transitions. [2021-07-09 18:25:50,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7444 transitions. [2021-07-09 18:25:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:50,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:50,724 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:50,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-09 18:25:50,927 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1971856055, now seen corresponding path program 149 times [2021-07-09 18:25:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474693702] [2021-07-09 18:25:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:51,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:51,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474693702] [2021-07-09 18:25:51,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474693702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:51,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819189786] [2021-07-09 18:25:51,143 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:51,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:25:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:51,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:51,631 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 18:25:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:52,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819189786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:52,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:52,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:25:52,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958539057] [2021-07-09 18:25:52,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:52,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:52,098 INFO L87 Difference]: Start difference. First operand 1622 states and 7444 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:52,442 INFO L93 Difference]: Finished difference Result 1668 states and 7554 transitions. [2021-07-09 18:25:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:25:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:25:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:52,447 INFO L225 Difference]: With dead ends: 1668 [2021-07-09 18:25:52,447 INFO L226 Difference]: Without dead ends: 1664 [2021-07-09 18:25:52,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:25:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-07-09 18:25:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1632. [2021-07-09 18:25:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 4.58185162477008) internal successors, (7473), 1631 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 7473 transitions. [2021-07-09 18:25:52,472 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 7473 transitions. Word has length 28 [2021-07-09 18:25:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:52,472 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 7473 transitions. [2021-07-09 18:25:52,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 7473 transitions. [2021-07-09 18:25:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:52,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:52,475 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:52,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:52,677 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1991978569, now seen corresponding path program 150 times [2021-07-09 18:25:52,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:52,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211204799] [2021-07-09 18:25:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:52,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211204799] [2021-07-09 18:25:52,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211204799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402866750] [2021-07-09 18:25:52,910 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:52,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:25:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:53,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402866750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:53,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:53,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:25:53,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966242807] [2021-07-09 18:25:53,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:53,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:53,631 INFO L87 Difference]: Start difference. First operand 1632 states and 7473 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:54,045 INFO L93 Difference]: Finished difference Result 1671 states and 7560 transitions. [2021-07-09 18:25:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:25:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:25:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:54,050 INFO L225 Difference]: With dead ends: 1671 [2021-07-09 18:25:54,050 INFO L226 Difference]: Without dead ends: 1667 [2021-07-09 18:25:54,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-07-09 18:25:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1636. [2021-07-09 18:25:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 4.575535168195719) internal successors, (7481), 1635 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 7481 transitions. [2021-07-09 18:25:54,075 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 7481 transitions. Word has length 28 [2021-07-09 18:25:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:54,075 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 7481 transitions. [2021-07-09 18:25:54,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 7481 transitions. [2021-07-09 18:25:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:54,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:54,079 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:54,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-09 18:25:54,279 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1733183245, now seen corresponding path program 151 times [2021-07-09 18:25:54,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458442766] [2021-07-09 18:25:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:54,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458442766] [2021-07-09 18:25:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458442766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072468647] [2021-07-09 18:25:54,485 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:55,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072468647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:55,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:55,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:25:55,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561421768] [2021-07-09 18:25:55,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:55,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:55,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:55,149 INFO L87 Difference]: Start difference. First operand 1636 states and 7481 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:55,550 INFO L93 Difference]: Finished difference Result 1674 states and 7564 transitions. [2021-07-09 18:25:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:25:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:25:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:55,554 INFO L225 Difference]: With dead ends: 1674 [2021-07-09 18:25:55,554 INFO L226 Difference]: Without dead ends: 1670 [2021-07-09 18:25:55,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-09 18:25:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1627. [2021-07-09 18:25:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 4.583640836408364) internal successors, (7453), 1626 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 7453 transitions. [2021-07-09 18:25:55,579 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 7453 transitions. Word has length 28 [2021-07-09 18:25:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:55,579 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 7453 transitions. [2021-07-09 18:25:55,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 7453 transitions. [2021-07-09 18:25:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:55,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:55,582 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:55,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:55,782 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1830495825, now seen corresponding path program 152 times [2021-07-09 18:25:55,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:55,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295897645] [2021-07-09 18:25:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:56,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:56,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295897645] [2021-07-09 18:25:56,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295897645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:56,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452395783] [2021-07-09 18:25:56,073 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:56,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:56,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:25:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452395783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:56,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:56,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722842383] [2021-07-09 18:25:56,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:56,999 INFO L87 Difference]: Start difference. First operand 1627 states and 7453 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:57,627 INFO L93 Difference]: Finished difference Result 1665 states and 7539 transitions. [2021-07-09 18:25:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:25:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:57,631 INFO L225 Difference]: With dead ends: 1665 [2021-07-09 18:25:57,631 INFO L226 Difference]: Without dead ends: 1661 [2021-07-09 18:25:57,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1455.6ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:25:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-09 18:25:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1631. [2021-07-09 18:25:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 4.5773006134969325) internal successors, (7461), 1630 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 7461 transitions. [2021-07-09 18:25:57,656 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 7461 transitions. Word has length 28 [2021-07-09 18:25:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:57,656 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 7461 transitions. [2021-07-09 18:25:57,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 7461 transitions. [2021-07-09 18:25:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:57,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:57,659 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:57,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:57,859 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191923, now seen corresponding path program 153 times [2021-07-09 18:25:57,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:57,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040267462] [2021-07-09 18:25:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:58,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:58,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040267462] [2021-07-09 18:25:58,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040267462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:58,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197318589] [2021-07-09 18:25:58,145 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:58,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:25:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:25:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:58,742 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:25:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:59,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197318589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:59,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:59,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:25:59,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716604063] [2021-07-09 18:25:59,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:59,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:59,095 INFO L87 Difference]: Start difference. First operand 1631 states and 7461 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:59,901 INFO L93 Difference]: Finished difference Result 1696 states and 7604 transitions. [2021-07-09 18:25:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:25:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:25:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:59,905 INFO L225 Difference]: With dead ends: 1696 [2021-07-09 18:25:59,905 INFO L226 Difference]: Without dead ends: 1692 [2021-07-09 18:25:59,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1541.1ms TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:25:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-07-09 18:25:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1622. [2021-07-09 18:25:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.586057988895743) internal successors, (7434), 1621 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7434 transitions. [2021-07-09 18:25:59,929 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7434 transitions. Word has length 28 [2021-07-09 18:25:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:59,929 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7434 transitions. [2021-07-09 18:25:59,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:25:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7434 transitions. [2021-07-09 18:25:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:25:59,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:59,932 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:00,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-09 18:26:00,133 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2138980049, now seen corresponding path program 154 times [2021-07-09 18:26:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:00,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580733632] [2021-07-09 18:26:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:00,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:00,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580733632] [2021-07-09 18:26:00,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580733632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:00,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680628710] [2021-07-09 18:26:00,386 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:00,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:00,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:00,931 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:26:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:01,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680628710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:01,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:01,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:01,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010556272] [2021-07-09 18:26:01,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:01,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:01,356 INFO L87 Difference]: Start difference. First operand 1622 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:01,934 INFO L93 Difference]: Finished difference Result 1654 states and 7498 transitions. [2021-07-09 18:26:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:26:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:01,938 INFO L225 Difference]: With dead ends: 1654 [2021-07-09 18:26:01,938 INFO L226 Difference]: Without dead ends: 1650 [2021-07-09 18:26:01,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1389.8ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:26:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-07-09 18:26:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1618. [2021-07-09 18:26:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.587507730364873) internal successors, (7418), 1617 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7418 transitions. [2021-07-09 18:26:01,962 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7418 transitions. Word has length 28 [2021-07-09 18:26:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:01,962 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7418 transitions. [2021-07-09 18:26:01,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7418 transitions. [2021-07-09 18:26:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:01,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:01,964 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:02,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:02,165 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash -196758805, now seen corresponding path program 155 times [2021-07-09 18:26:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:02,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993900388] [2021-07-09 18:26:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:02,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:02,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993900388] [2021-07-09 18:26:02,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993900388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:02,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668841912] [2021-07-09 18:26:02,349 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:02,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:26:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:03,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668841912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:03,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:03,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:03,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786868700] [2021-07-09 18:26:03,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:03,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:03,288 INFO L87 Difference]: Start difference. First operand 1618 states and 7418 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:03,501 INFO L93 Difference]: Finished difference Result 1650 states and 7490 transitions. [2021-07-09 18:26:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:03,505 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 18:26:03,505 INFO L226 Difference]: Without dead ends: 1646 [2021-07-09 18:26:03,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 931.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-07-09 18:26:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1610. [2021-07-09 18:26:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 4.599129894344313) internal successors, (7400), 1609 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 7400 transitions. [2021-07-09 18:26:03,529 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 7400 transitions. Word has length 28 [2021-07-09 18:26:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:03,529 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 7400 transitions. [2021-07-09 18:26:03,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 7400 transitions. [2021-07-09 18:26:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:03,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:03,532 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:03,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-07-09 18:26:03,733 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:03,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1332363625, now seen corresponding path program 156 times [2021-07-09 18:26:03,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:03,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103541635] [2021-07-09 18:26:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:03,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:03,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103541635] [2021-07-09 18:26:03,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103541635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:03,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406048407] [2021-07-09 18:26:03,896 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:03,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:26:03,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:03,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:26:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406048407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:26:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487805960] [2021-07-09 18:26:04,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:26:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:26:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:26:04,610 INFO L87 Difference]: Start difference. First operand 1610 states and 7400 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:04,987 INFO L93 Difference]: Finished difference Result 1574 states and 7191 transitions. [2021-07-09 18:26:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:26:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2021-07-09 18:26:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:04,991 INFO L225 Difference]: With dead ends: 1574 [2021-07-09 18:26:04,991 INFO L226 Difference]: Without dead ends: 1559 [2021-07-09 18:26:04,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:26:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-09 18:26:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1531. [2021-07-09 18:26:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 4.633986928104576) internal successors, (7090), 1530 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 7090 transitions. [2021-07-09 18:26:05,013 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 7090 transitions. Word has length 28 [2021-07-09 18:26:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:05,014 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 7090 transitions. [2021-07-09 18:26:05,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 7090 transitions. [2021-07-09 18:26:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:05,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:05,016 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:05,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-09 18:26:05,217 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2110291579, now seen corresponding path program 157 times [2021-07-09 18:26:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:05,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013854087] [2021-07-09 18:26:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:05,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013854087] [2021-07-09 18:26:05,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013854087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421127305] [2021-07-09 18:26:05,484 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:05,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:06,063 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:26:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:06,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421127305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:06,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:06,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:26:06,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903601433] [2021-07-09 18:26:06,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:06,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:06,438 INFO L87 Difference]: Start difference. First operand 1531 states and 7090 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:07,034 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-09 18:26:07,213 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:26:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:07,311 INFO L93 Difference]: Finished difference Result 1578 states and 7201 transitions. [2021-07-09 18:26:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:26:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:26:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:07,315 INFO L225 Difference]: With dead ends: 1578 [2021-07-09 18:26:07,315 INFO L226 Difference]: Without dead ends: 1574 [2021-07-09 18:26:07,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1628.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:26:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-07-09 18:26:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1538. [2021-07-09 18:26:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 4.62654521795706) internal successors, (7111), 1537 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 7111 transitions. [2021-07-09 18:26:07,339 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 7111 transitions. Word has length 28 [2021-07-09 18:26:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:07,339 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 7111 transitions. [2021-07-09 18:26:07,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 7111 transitions. [2021-07-09 18:26:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:07,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:07,342 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:07,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-07-09 18:26:07,542 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1647182861, now seen corresponding path program 158 times [2021-07-09 18:26:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:07,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579592945] [2021-07-09 18:26:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579592945] [2021-07-09 18:26:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579592945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574125468] [2021-07-09 18:26:07,805 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:07,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:26:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:08,392 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:26:08,550 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:26:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:08,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574125468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:08,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:08,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:26:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260664960] [2021-07-09 18:26:08,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:08,897 INFO L87 Difference]: Start difference. First operand 1538 states and 7111 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:09,669 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:26:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:09,885 INFO L93 Difference]: Finished difference Result 1586 states and 7223 transitions. [2021-07-09 18:26:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:26:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:26:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:09,889 INFO L225 Difference]: With dead ends: 1586 [2021-07-09 18:26:09,889 INFO L226 Difference]: Without dead ends: 1582 [2021-07-09 18:26:09,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1851.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:26:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-09 18:26:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1544. [2021-07-09 18:26:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 4.620868438107583) internal successors, (7130), 1543 states have internal predecessors, (7130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 7130 transitions. [2021-07-09 18:26:09,912 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 7130 transitions. Word has length 28 [2021-07-09 18:26:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:09,912 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 7130 transitions. [2021-07-09 18:26:09,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 7130 transitions. [2021-07-09 18:26:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:09,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:09,915 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:10,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-07-09 18:26:10,116 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash -53750163, now seen corresponding path program 159 times [2021-07-09 18:26:10,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:10,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651822984] [2021-07-09 18:26:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:10,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:10,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651822984] [2021-07-09 18:26:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651822984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:10,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608062799] [2021-07-09 18:26:10,277 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:10,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:26:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:26:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608062799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:10,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:10,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:26:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256432443] [2021-07-09 18:26:10,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:26:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:26:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:26:10,852 INFO L87 Difference]: Start difference. First operand 1544 states and 7130 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:11,272 INFO L93 Difference]: Finished difference Result 1511 states and 6853 transitions. [2021-07-09 18:26:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:26:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2021-07-09 18:26:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:11,276 INFO L225 Difference]: With dead ends: 1511 [2021-07-09 18:26:11,276 INFO L226 Difference]: Without dead ends: 1493 [2021-07-09 18:26:11,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:26:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-07-09 18:26:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1466. [2021-07-09 18:26:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-07-09 18:26:11,298 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-07-09 18:26:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:11,298 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-07-09 18:26:11,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-07-09 18:26:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:11,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:11,300 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:11,501 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash 798561929, now seen corresponding path program 160 times [2021-07-09 18:26:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:11,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050003556] [2021-07-09 18:26:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:11,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050003556] [2021-07-09 18:26:11,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050003556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400053559] [2021-07-09 18:26:11,717 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:11,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:12,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400053559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:12,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192397820] [2021-07-09 18:26:12,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:12,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:12,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:12,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:12,401 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:12,633 INFO L93 Difference]: Finished difference Result 1512 states and 6853 transitions. [2021-07-09 18:26:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:26:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:12,637 INFO L225 Difference]: With dead ends: 1512 [2021-07-09 18:26:12,637 INFO L226 Difference]: Without dead ends: 1508 [2021-07-09 18:26:12,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-07-09 18:26:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1468. [2021-07-09 18:26:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 4.5998636673483295) internal successors, (6748), 1467 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 6748 transitions. [2021-07-09 18:26:12,659 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 6748 transitions. Word has length 28 [2021-07-09 18:26:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:12,659 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 6748 transitions. [2021-07-09 18:26:12,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 6748 transitions. [2021-07-09 18:26:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:12,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:12,661 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:12,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:12,862 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1757016913, now seen corresponding path program 161 times [2021-07-09 18:26:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:12,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743854921] [2021-07-09 18:26:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:13,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743854921] [2021-07-09 18:26:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743854921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620568189] [2021-07-09 18:26:13,056 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:13,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:26:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620568189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:13,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363123547] [2021-07-09 18:26:13,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:13,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:13,911 INFO L87 Difference]: Start difference. First operand 1468 states and 6748 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:14,296 INFO L93 Difference]: Finished difference Result 1517 states and 6862 transitions. [2021-07-09 18:26:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:26:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:14,300 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 18:26:14,300 INFO L226 Difference]: Without dead ends: 1513 [2021-07-09 18:26:14,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:26:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-09 18:26:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-07-09 18:26:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-07-09 18:26:14,320 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-07-09 18:26:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:14,321 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-07-09 18:26:14,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-07-09 18:26:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:14,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:14,323 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:14,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:14,523 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884241, now seen corresponding path program 162 times [2021-07-09 18:26:14,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:14,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764027758] [2021-07-09 18:26:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:14,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764027758] [2021-07-09 18:26:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764027758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106315409] [2021-07-09 18:26:14,773 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:14,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:26:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106315409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:15,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:15,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:15,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255615504] [2021-07-09 18:26:15,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:15,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:15,493 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:16,141 INFO L93 Difference]: Finished difference Result 1519 states and 6864 transitions. [2021-07-09 18:26:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:26:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:16,144 INFO L225 Difference]: With dead ends: 1519 [2021-07-09 18:26:16,144 INFO L226 Difference]: Without dead ends: 1515 [2021-07-09 18:26:16,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1226.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:26:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-09 18:26:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1466. [2021-07-09 18:26:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-07-09 18:26:16,166 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-07-09 18:26:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:16,166 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-07-09 18:26:16,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-07-09 18:26:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:16,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:16,168 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:16,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:16,369 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088917, now seen corresponding path program 163 times [2021-07-09 18:26:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:16,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650186435] [2021-07-09 18:26:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:16,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650186435] [2021-07-09 18:26:16,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650186435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385471312] [2021-07-09 18:26:16,581 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:17,046 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:26:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:17,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385471312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:17,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:17,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654687719] [2021-07-09 18:26:17,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:17,526 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:17,989 INFO L93 Difference]: Finished difference Result 1517 states and 6858 transitions. [2021-07-09 18:26:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:26:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:17,993 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 18:26:17,993 INFO L226 Difference]: Without dead ends: 1513 [2021-07-09 18:26:17,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1161.5ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:26:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-09 18:26:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-07-09 18:26:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-07-09 18:26:18,014 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-07-09 18:26:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:18,014 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-07-09 18:26:18,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-07-09 18:26:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:18,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:18,017 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:18,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:18,217 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1768583857, now seen corresponding path program 164 times [2021-07-09 18:26:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:18,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214423090] [2021-07-09 18:26:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:18,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214423090] [2021-07-09 18:26:18,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214423090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377875710] [2021-07-09 18:26:18,455 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:18,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:18,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:26:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377875710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:19,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:19,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-07-09 18:26:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911832978] [2021-07-09 18:26:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:19,112 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2021-07-09 18:26:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:19,650 INFO L93 Difference]: Finished difference Result 1192 states and 5241 transitions. [2021-07-09 18:26:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:26:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 28 [2021-07-09 18:26:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:19,653 INFO L225 Difference]: With dead ends: 1192 [2021-07-09 18:26:19,653 INFO L226 Difference]: Without dead ends: 1168 [2021-07-09 18:26:19,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:26:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-09 18:26:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1151. [2021-07-09 18:26:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 4.472173913043478) internal successors, (5143), 1150 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 5143 transitions. [2021-07-09 18:26:19,668 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 5143 transitions. Word has length 28 [2021-07-09 18:26:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:19,669 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 5143 transitions. [2021-07-09 18:26:19,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2021-07-09 18:26:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 5143 transitions. [2021-07-09 18:26:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:19,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:19,671 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:19,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:19,871 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 108442159, now seen corresponding path program 165 times [2021-07-09 18:26:19,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:19,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377081513] [2021-07-09 18:26:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:20,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:20,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377081513] [2021-07-09 18:26:20,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377081513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:20,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294334681] [2021-07-09 18:26:20,214 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:20,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:26:20,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:20,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:26:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:21,063 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 18:26:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:21,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294334681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:21,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:21,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:26:21,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406231530] [2021-07-09 18:26:21,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:21,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:21,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:21,343 INFO L87 Difference]: Start difference. First operand 1151 states and 5143 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:21,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:26:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:22,044 INFO L93 Difference]: Finished difference Result 1185 states and 5217 transitions. [2021-07-09 18:26:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:26:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:26:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:22,047 INFO L225 Difference]: With dead ends: 1185 [2021-07-09 18:26:22,047 INFO L226 Difference]: Without dead ends: 1181 [2021-07-09 18:26:22,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1711.6ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:26:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-07-09 18:26:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1145. [2021-07-09 18:26:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 4.481643356643357) internal successors, (5127), 1144 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 5127 transitions. [2021-07-09 18:26:22,063 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 5127 transitions. Word has length 28 [2021-07-09 18:26:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:22,063 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 5127 transitions. [2021-07-09 18:26:22,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 5127 transitions. [2021-07-09 18:26:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:22,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:22,065 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:22,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:22,266 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1805090615, now seen corresponding path program 166 times [2021-07-09 18:26:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760749965] [2021-07-09 18:26:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:22,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760749965] [2021-07-09 18:26:22,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760749965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774239961] [2021-07-09 18:26:22,486 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:22,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:22,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:23,098 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:26:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:23,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774239961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:23,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:23,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:26:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77081753] [2021-07-09 18:26:23,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:23,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:23,464 INFO L87 Difference]: Start difference. First operand 1145 states and 5127 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:23,986 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-09 18:26:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:24,089 INFO L93 Difference]: Finished difference Result 1180 states and 5202 transitions. [2021-07-09 18:26:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:26:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:26:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:24,092 INFO L225 Difference]: With dead ends: 1180 [2021-07-09 18:26:24,092 INFO L226 Difference]: Without dead ends: 1176 [2021-07-09 18:26:24,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:26:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-07-09 18:26:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2021-07-09 18:26:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 4.493827160493828) internal successors, (5096), 1134 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 5096 transitions. [2021-07-09 18:26:24,107 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 5096 transitions. Word has length 28 [2021-07-09 18:26:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:24,107 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 5096 transitions. [2021-07-09 18:26:24,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 5096 transitions. [2021-07-09 18:26:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:26:24,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:24,109 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:24,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,310 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1952383825, now seen corresponding path program 167 times [2021-07-09 18:26:24,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:24,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389187322] [2021-07-09 18:26:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:24,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389187322] [2021-07-09 18:26:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389187322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244107432] [2021-07-09 18:26:24,587 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:26:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:26:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:25,259 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:26:25,414 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:26:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244107432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:26:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581223135] [2021-07-09 18:26:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:25,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:25,700 INFO L87 Difference]: Start difference. First operand 1135 states and 5096 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:26,422 INFO L93 Difference]: Finished difference Result 1168 states and 5162 transitions. [2021-07-09 18:26:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:26:26,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 [2021-07-09 18:26:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:26,425 INFO L225 Difference]: With dead ends: 1168 [2021-07-09 18:26:26,425 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 18:26:26,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:26:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 18:26:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1112. [2021-07-09 18:26:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 4.53015301530153) internal successors, (5033), 1111 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 5033 transitions. [2021-07-09 18:26:26,440 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 5033 transitions. Word has length 28 [2021-07-09 18:26:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:26,440 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 5033 transitions. [2021-07-09 18:26:26,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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) [2021-07-09 18:26:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 5033 transitions. [2021-07-09 18:26:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:26,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:26,442 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:26,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-09 18:26:26,643 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1451861432, now seen corresponding path program 168 times [2021-07-09 18:26:26,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:26,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336643572] [2021-07-09 18:26:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:26:26,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336643572] [2021-07-09 18:26:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336643572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388807883] [2021-07-09 18:26:26,807 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:26,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:26:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:26:26,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:26:27,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:26:27,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:27,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:26:27,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:27,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:26:27,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:27,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:26:27,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:123, output treesize:95 [2021-07-09 18:26:42,175 WARN L205 SmtUtils]: Spent 14.51 s on a formula simplification that was a NOOP. DAG size: 57 [2021-07-09 18:26:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:26:42,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388807883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:42,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:42,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-07-09 18:26:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600404841] [2021-07-09 18:26:42,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:26:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:26:42,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:26:42,189 INFO L87 Difference]: Start difference. First operand 1112 states and 5033 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:44,524 INFO L93 Difference]: Finished difference Result 2488 states and 10938 transitions. [2021-07-09 18:26:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:26:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 [2021-07-09 18:26:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:44,530 INFO L225 Difference]: With dead ends: 2488 [2021-07-09 18:26:44,530 INFO L226 Difference]: Without dead ends: 2422 [2021-07-09 18:26:44,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 15178.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-07-09 18:26:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1684. [2021-07-09 18:26:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 4.7260843731431965) internal successors, (7954), 1683 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 7954 transitions. [2021-07-09 18:26:44,560 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 7954 transitions. Word has length 29 [2021-07-09 18:26:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:44,560 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 7954 transitions. [2021-07-09 18:26:44,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 7954 transitions. [2021-07-09 18:26:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:44,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:44,563 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:44,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-07-09 18:26:44,764 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -462072546, now seen corresponding path program 169 times [2021-07-09 18:26:44,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:44,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979052554] [2021-07-09 18:26:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:45,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:45,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979052554] [2021-07-09 18:26:45,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979052554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:45,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856223778] [2021-07-09 18:26:45,085 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:26:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856223778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:46,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:46,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:46,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312908560] [2021-07-09 18:26:46,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:46,002 INFO L87 Difference]: Start difference. First operand 1684 states and 7954 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:46,364 INFO L93 Difference]: Finished difference Result 1831 states and 8338 transitions. [2021-07-09 18:26:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:26:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:46,369 INFO L225 Difference]: With dead ends: 1831 [2021-07-09 18:26:46,369 INFO L226 Difference]: Without dead ends: 1814 [2021-07-09 18:26:46,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1144.2ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:26:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-07-09 18:26:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1728. [2021-07-09 18:26:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 4.672264041690793) internal successors, (8069), 1727 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 8069 transitions. [2021-07-09 18:26:46,394 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 8069 transitions. Word has length 29 [2021-07-09 18:26:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:46,394 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 8069 transitions. [2021-07-09 18:26:46,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 8069 transitions. [2021-07-09 18:26:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:46,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:46,397 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:46,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-09 18:26:46,597 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:46,598 INFO L82 PathProgramCache]: Analyzing trace with hash 347953604, now seen corresponding path program 170 times [2021-07-09 18:26:46,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:46,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026791632] [2021-07-09 18:26:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:46,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:46,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026791632] [2021-07-09 18:26:46,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026791632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:46,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202077781] [2021-07-09 18:26:46,893 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:46,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:46,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:26:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:47,363 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 18:26:47,577 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:26:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:47,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202077781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:47,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:47,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:47,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70366599] [2021-07-09 18:26:47,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:47,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:48,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:48,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:48,000 INFO L87 Difference]: Start difference. First operand 1728 states and 8069 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,700 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 18:26:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:48,833 INFO L93 Difference]: Finished difference Result 1769 states and 8177 transitions. [2021-07-09 18:26:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:26:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:48,838 INFO L225 Difference]: With dead ends: 1769 [2021-07-09 18:26:48,838 INFO L226 Difference]: Without dead ends: 1762 [2021-07-09 18:26:48,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1721.2ms TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:26:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-07-09 18:26:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1751. [2021-07-09 18:26:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 4.646857142857143) internal successors, (8132), 1750 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 8132 transitions. [2021-07-09 18:26:48,864 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 8132 transitions. Word has length 29 [2021-07-09 18:26:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:48,864 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 8132 transitions. [2021-07-09 18:26:48,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 8132 transitions. [2021-07-09 18:26:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:48,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:48,867 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:49,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-09 18:26:49,068 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash 865544252, now seen corresponding path program 171 times [2021-07-09 18:26:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:49,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123593314] [2021-07-09 18:26:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:49,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123593314] [2021-07-09 18:26:49,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123593314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841764777] [2021-07-09 18:26:49,423 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:49,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:26:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:26:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:49,969 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:26:50,142 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:26:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841764777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:50,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:50,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003146994] [2021-07-09 18:26:50,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:50,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:50,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:50,498 INFO L87 Difference]: Start difference. First operand 1751 states and 8132 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:51,061 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:26:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:51,432 INFO L93 Difference]: Finished difference Result 1810 states and 8279 transitions. [2021-07-09 18:26:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:26:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:51,437 INFO L225 Difference]: With dead ends: 1810 [2021-07-09 18:26:51,437 INFO L226 Difference]: Without dead ends: 1798 [2021-07-09 18:26:51,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1875.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:26:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-07-09 18:26:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1769. [2021-07-09 18:26:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 4.628393665158371) internal successors, (8183), 1768 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 8183 transitions. [2021-07-09 18:26:51,463 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 8183 transitions. Word has length 29 [2021-07-09 18:26:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:51,463 INFO L482 AbstractCegarLoop]: Abstraction has 1769 states and 8183 transitions. [2021-07-09 18:26:51,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 8183 transitions. [2021-07-09 18:26:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:51,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:51,466 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:51,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:51,667 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 328099136, now seen corresponding path program 172 times [2021-07-09 18:26:51,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:51,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051350371] [2021-07-09 18:26:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:52,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:52,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051350371] [2021-07-09 18:26:52,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051350371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:52,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092322752] [2021-07-09 18:26:52,018 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:52,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:52,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:52,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:26:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092322752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:52,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002145949] [2021-07-09 18:26:52,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:52,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:52,641 INFO L87 Difference]: Start difference. First operand 1769 states and 8183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:53,754 INFO L93 Difference]: Finished difference Result 2432 states and 10664 transitions. [2021-07-09 18:26:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:26:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:53,760 INFO L225 Difference]: With dead ends: 2432 [2021-07-09 18:26:53,760 INFO L226 Difference]: Without dead ends: 2349 [2021-07-09 18:26:53,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1596.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:26:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-07-09 18:26:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1981. [2021-07-09 18:26:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 4.653030303030303) internal successors, (9213), 1980 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 9213 transitions. [2021-07-09 18:26:53,794 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 9213 transitions. Word has length 29 [2021-07-09 18:26:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:53,794 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 9213 transitions. [2021-07-09 18:26:53,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 9213 transitions. [2021-07-09 18:26:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:53,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:53,797 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:53,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:53,998 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1585433638, now seen corresponding path program 173 times [2021-07-09 18:26:53,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:53,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973853729] [2021-07-09 18:26:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:54,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:54,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973853729] [2021-07-09 18:26:54,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973853729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703372761] [2021-07-09 18:26:54,496 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:54,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:26:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:26:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703372761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:55,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:55,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:55,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867507072] [2021-07-09 18:26:55,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:55,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:55,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:55,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:55,383 INFO L87 Difference]: Start difference. First operand 1981 states and 9213 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:56,739 INFO L93 Difference]: Finished difference Result 2286 states and 10241 transitions. [2021-07-09 18:26:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:26:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:56,744 INFO L225 Difference]: With dead ends: 2286 [2021-07-09 18:26:56,744 INFO L226 Difference]: Without dead ends: 2194 [2021-07-09 18:26:56,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2062.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:26:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-07-09 18:26:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2066. [2021-07-09 18:26:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.632445520581114) internal successors, (9566), 2065 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 9566 transitions. [2021-07-09 18:26:56,791 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 9566 transitions. Word has length 29 [2021-07-09 18:26:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:56,791 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 9566 transitions. [2021-07-09 18:26:56,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 9566 transitions. [2021-07-09 18:26:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:56,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:56,795 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:56,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:56,995 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 89744602, now seen corresponding path program 174 times [2021-07-09 18:26:56,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:56,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341439466] [2021-07-09 18:26:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:57,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341439466] [2021-07-09 18:26:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341439466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035603312] [2021-07-09 18:26:57,295 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:57,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:26:57,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:26:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:57,728 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 18:26:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:58,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035603312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:58,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:58,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:58,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489679666] [2021-07-09 18:26:58,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:58,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:58,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:58,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:58,086 INFO L87 Difference]: Start difference. First operand 2066 states and 9566 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:58,597 INFO L93 Difference]: Finished difference Result 2244 states and 10109 transitions. [2021-07-09 18:26:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:26:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:26:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:58,603 INFO L225 Difference]: With dead ends: 2244 [2021-07-09 18:26:58,603 INFO L226 Difference]: Without dead ends: 2232 [2021-07-09 18:26:58,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1146.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:26:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-07-09 18:26:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2102. [2021-07-09 18:26:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 4.627796287482151) internal successors, (9723), 2101 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 9723 transitions. [2021-07-09 18:26:58,636 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 9723 transitions. Word has length 29 [2021-07-09 18:26:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:58,636 INFO L482 AbstractCegarLoop]: Abstraction has 2102 states and 9723 transitions. [2021-07-09 18:26:58,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 9723 transitions. [2021-07-09 18:26:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:26:58,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:58,640 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:58,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-09 18:26:58,841 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -477534946, now seen corresponding path program 175 times [2021-07-09 18:26:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:58,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933803041] [2021-07-09 18:26:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:59,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:59,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933803041] [2021-07-09 18:26:59,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933803041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:59,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322317268] [2021-07-09 18:26:59,138 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:26:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322317268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014744742] [2021-07-09 18:27:00,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:00,165 INFO L87 Difference]: Start difference. First operand 2102 states and 9723 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:01,293 INFO L93 Difference]: Finished difference Result 2144 states and 9820 transitions. [2021-07-09 18:27:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:27:01,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:01,298 INFO L225 Difference]: With dead ends: 2144 [2021-07-09 18:27:01,298 INFO L226 Difference]: Without dead ends: 2132 [2021-07-09 18:27:01,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1889.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:27:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-07-09 18:27:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2103. [2021-07-09 18:27:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.627021883920076) internal successors, (9726), 2102 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9726 transitions. [2021-07-09 18:27:01,330 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9726 transitions. Word has length 29 [2021-07-09 18:27:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:01,330 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 9726 transitions. [2021-07-09 18:27:01,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9726 transitions. [2021-07-09 18:27:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:01,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:01,334 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:01,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:01,534 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1199394428, now seen corresponding path program 176 times [2021-07-09 18:27:01,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:01,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990702591] [2021-07-09 18:27:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:01,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990702591] [2021-07-09 18:27:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990702591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005635545] [2021-07-09 18:27:01,799 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:01,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:02,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005635545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:02,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:02,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433984331] [2021-07-09 18:27:02,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:02,636 INFO L87 Difference]: Start difference. First operand 2103 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:03,195 INFO L93 Difference]: Finished difference Result 2149 states and 9838 transitions. [2021-07-09 18:27:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:27:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:03,214 INFO L225 Difference]: With dead ends: 2149 [2021-07-09 18:27:03,215 INFO L226 Difference]: Without dead ends: 2142 [2021-07-09 18:27:03,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1172.7ms TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:27:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-07-09 18:27:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2114. [2021-07-09 18:27:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.613819214387127) internal successors, (9749), 2113 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9749 transitions. [2021-07-09 18:27:03,246 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9749 transitions. Word has length 29 [2021-07-09 18:27:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:03,246 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 9749 transitions. [2021-07-09 18:27:03,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9749 transitions. [2021-07-09 18:27:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:03,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:03,250 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:03,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-09 18:27:03,451 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash -714138346, now seen corresponding path program 177 times [2021-07-09 18:27:03,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:03,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553645065] [2021-07-09 18:27:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:03,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553645065] [2021-07-09 18:27:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553645065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052053831] [2021-07-09 18:27:03,901 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:03,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:27:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:04,485 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 18:27:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:04,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052053831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:04,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:04,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415281422] [2021-07-09 18:27:04,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:04,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:04,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:04,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:04,915 INFO L87 Difference]: Start difference. First operand 2114 states and 9749 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:06,232 INFO L93 Difference]: Finished difference Result 2362 states and 10569 transitions. [2021-07-09 18:27:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:27:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:06,238 INFO L225 Difference]: With dead ends: 2362 [2021-07-09 18:27:06,238 INFO L226 Difference]: Without dead ends: 2294 [2021-07-09 18:27:06,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2137.2ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:27:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-07-09 18:27:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2155. [2021-07-09 18:27:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 4.589136490250697) internal successors, (9885), 2154 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 9885 transitions. [2021-07-09 18:27:06,270 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 9885 transitions. Word has length 29 [2021-07-09 18:27:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:06,271 INFO L482 AbstractCegarLoop]: Abstraction has 2155 states and 9885 transitions. [2021-07-09 18:27:06,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 9885 transitions. [2021-07-09 18:27:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:06,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:06,274 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:06,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-07-09 18:27:06,475 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash 961039894, now seen corresponding path program 178 times [2021-07-09 18:27:06,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:06,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108859820] [2021-07-09 18:27:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:06,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:06,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108859820] [2021-07-09 18:27:06,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108859820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:06,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415376375] [2021-07-09 18:27:06,885 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:06,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:27:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415376375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:07,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:07,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36506445] [2021-07-09 18:27:07,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:07,633 INFO L87 Difference]: Start difference. First operand 2155 states and 9885 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:07,913 INFO L93 Difference]: Finished difference Result 2204 states and 10013 transitions. [2021-07-09 18:27:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:27:07,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:07,918 INFO L225 Difference]: With dead ends: 2204 [2021-07-09 18:27:07,918 INFO L226 Difference]: Without dead ends: 2197 [2021-07-09 18:27:07,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-07-09 18:27:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2167. [2021-07-09 18:27:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 4.577562326869806) internal successors, (9915), 2166 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 9915 transitions. [2021-07-09 18:27:07,951 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 9915 transitions. Word has length 29 [2021-07-09 18:27:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:07,951 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 9915 transitions. [2021-07-09 18:27:07,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 9915 transitions. [2021-07-09 18:27:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:07,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:07,955 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:08,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:08,155 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash 393760346, now seen corresponding path program 179 times [2021-07-09 18:27:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:08,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857061611] [2021-07-09 18:27:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:08,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:08,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857061611] [2021-07-09 18:27:08,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857061611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:08,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260096716] [2021-07-09 18:27:08,511 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:08,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:27:08,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:08,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:09,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260096716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:09,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:09,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:09,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337040654] [2021-07-09 18:27:09,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:09,285 INFO L87 Difference]: Start difference. First operand 2167 states and 9915 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:09,774 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-09 18:27:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:10,066 INFO L93 Difference]: Finished difference Result 2306 states and 10326 transitions. [2021-07-09 18:27:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:10,073 INFO L225 Difference]: With dead ends: 2306 [2021-07-09 18:27:10,073 INFO L226 Difference]: Without dead ends: 2254 [2021-07-09 18:27:10,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1459.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:27:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-09 18:27:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2187. [2021-07-09 18:27:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 4.562671546203111) internal successors, (9974), 2186 states have internal predecessors, (9974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9974 transitions. [2021-07-09 18:27:10,106 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9974 transitions. Word has length 29 [2021-07-09 18:27:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:10,106 INFO L482 AbstractCegarLoop]: Abstraction has 2187 states and 9974 transitions. [2021-07-09 18:27:10,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9974 transitions. [2021-07-09 18:27:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:10,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:10,110 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:10,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable792 [2021-07-09 18:27:10,311 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1672037662, now seen corresponding path program 180 times [2021-07-09 18:27:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:10,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441592909] [2021-07-09 18:27:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:10,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:10,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441592909] [2021-07-09 18:27:10,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441592909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:10,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320576821] [2021-07-09 18:27:10,637 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:10,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:27:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:11,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320576821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:11,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:11,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:11,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478982166] [2021-07-09 18:27:11,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:11,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:11,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:11,566 INFO L87 Difference]: Start difference. First operand 2187 states and 9974 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:12,540 INFO L93 Difference]: Finished difference Result 2348 states and 10539 transitions. [2021-07-09 18:27:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:12,545 INFO L225 Difference]: With dead ends: 2348 [2021-07-09 18:27:12,546 INFO L226 Difference]: Without dead ends: 2316 [2021-07-09 18:27:12,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1728.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:27:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-07-09 18:27:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2243. [2021-07-09 18:27:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 4.558876003568242) internal successors, (10221), 2242 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 10221 transitions. [2021-07-09 18:27:12,579 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 10221 transitions. Word has length 29 [2021-07-09 18:27:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:12,580 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 10221 transitions. [2021-07-09 18:27:12,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 10221 transitions. [2021-07-09 18:27:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:12,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:12,583 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:12,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-09 18:27:12,784 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1266240858, now seen corresponding path program 181 times [2021-07-09 18:27:12,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:12,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143646043] [2021-07-09 18:27:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:13,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143646043] [2021-07-09 18:27:13,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143646043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:13,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811779724] [2021-07-09 18:27:13,039 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:27:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:13,572 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:27:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811779724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:13,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:13,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905046977] [2021-07-09 18:27:13,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:13,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:13,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:13,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:13,948 INFO L87 Difference]: Start difference. First operand 2243 states and 10221 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:14,718 INFO L93 Difference]: Finished difference Result 2425 states and 10774 transitions. [2021-07-09 18:27:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:27:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:14,724 INFO L225 Difference]: With dead ends: 2425 [2021-07-09 18:27:14,724 INFO L226 Difference]: Without dead ends: 2413 [2021-07-09 18:27:14,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1442.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:27:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-07-09 18:27:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2246. [2021-07-09 18:27:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 4.564810690423163) internal successors, (10248), 2245 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 10248 transitions. [2021-07-09 18:27:14,759 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 10248 transitions. Word has length 29 [2021-07-09 18:27:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:14,760 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 10248 transitions. [2021-07-09 18:27:14,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 10248 transitions. [2021-07-09 18:27:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:14,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:14,763 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:14,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:14,965 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 698961310, now seen corresponding path program 182 times [2021-07-09 18:27:14,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:14,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643702099] [2021-07-09 18:27:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:15,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:15,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643702099] [2021-07-09 18:27:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643702099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:15,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094708525] [2021-07-09 18:27:15,233 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:15,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094708525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:16,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:16,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:16,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052981942] [2021-07-09 18:27:16,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:16,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:16,237 INFO L87 Difference]: Start difference. First operand 2246 states and 10248 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:16,984 INFO L93 Difference]: Finished difference Result 2282 states and 10326 transitions. [2021-07-09 18:27:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:27:16,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:16,989 INFO L225 Difference]: With dead ends: 2282 [2021-07-09 18:27:16,989 INFO L226 Difference]: Without dead ends: 2270 [2021-07-09 18:27:16,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1515.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:27:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-07-09 18:27:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2241. [2021-07-09 18:27:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.568303571428571) internal successors, (10233), 2240 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 10233 transitions. [2021-07-09 18:27:17,023 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 10233 transitions. Word has length 29 [2021-07-09 18:27:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:17,023 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 10233 transitions. [2021-07-09 18:27:17,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 10233 transitions. [2021-07-09 18:27:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:17,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:17,027 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:17,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-07-09 18:27:17,227 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash 778277730, now seen corresponding path program 183 times [2021-07-09 18:27:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:17,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172671425] [2021-07-09 18:27:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:17,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:17,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172671425] [2021-07-09 18:27:17,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172671425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:17,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759927206] [2021-07-09 18:27:17,542 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:27:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:17,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:18,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759927206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:18,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:18,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:18,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787444521] [2021-07-09 18:27:18,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:18,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:18,534 INFO L87 Difference]: Start difference. First operand 2241 states and 10233 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:18,937 INFO L93 Difference]: Finished difference Result 2376 states and 10589 transitions. [2021-07-09 18:27:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:27:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:18,943 INFO L225 Difference]: With dead ends: 2376 [2021-07-09 18:27:18,943 INFO L226 Difference]: Without dead ends: 2359 [2021-07-09 18:27:18,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1233.3ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:27:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-09 18:27:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2234. [2021-07-09 18:27:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.5763546798029555) internal successors, (10219), 2233 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 10219 transitions. [2021-07-09 18:27:18,978 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 10219 transitions. Word has length 29 [2021-07-09 18:27:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:18,979 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 10219 transitions. [2021-07-09 18:27:18,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 10219 transitions. [2021-07-09 18:27:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:18,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:18,982 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:19,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:19,183 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1588303880, now seen corresponding path program 184 times [2021-07-09 18:27:19,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:19,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996416308] [2021-07-09 18:27:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:19,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:19,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996416308] [2021-07-09 18:27:19,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996416308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:19,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128903188] [2021-07-09 18:27:19,506 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:19,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:19,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:27:19,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:20,025 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:27:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:20,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128903188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:20,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:20,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049586809] [2021-07-09 18:27:20,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:20,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:20,378 INFO L87 Difference]: Start difference. First operand 2234 states and 10219 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:20,981 INFO L93 Difference]: Finished difference Result 2561 states and 11409 transitions. [2021-07-09 18:27:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:20,987 INFO L225 Difference]: With dead ends: 2561 [2021-07-09 18:27:20,987 INFO L226 Difference]: Without dead ends: 2547 [2021-07-09 18:27:20,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1313.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:27:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-07-09 18:27:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2320. [2021-07-09 18:27:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.567917205692108) internal successors, (10593), 2319 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 10593 transitions. [2021-07-09 18:27:21,025 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 10593 transitions. Word has length 29 [2021-07-09 18:27:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:21,025 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 10593 transitions. [2021-07-09 18:27:21,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 10593 transitions. [2021-07-09 18:27:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:21,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:21,029 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:21,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-07-09 18:27:21,230 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2105894528, now seen corresponding path program 185 times [2021-07-09 18:27:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:21,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913445151] [2021-07-09 18:27:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913445151] [2021-07-09 18:27:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913445151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690643855] [2021-07-09 18:27:21,663 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:21,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:27:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:22,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:27:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:22,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690643855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:22,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:22,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103486272] [2021-07-09 18:27:22,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:22,727 INFO L87 Difference]: Start difference. First operand 2320 states and 10593 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:23,372 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 18:27:23,548 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-09 18:27:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:23,991 INFO L93 Difference]: Finished difference Result 2477 states and 11087 transitions. [2021-07-09 18:27:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:23,997 INFO L225 Difference]: With dead ends: 2477 [2021-07-09 18:27:23,997 INFO L226 Difference]: Without dead ends: 2467 [2021-07-09 18:27:23,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2201.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:27:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-07-09 18:27:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2342. [2021-07-09 18:27:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.553182400683468) internal successors, (10659), 2341 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10659 transitions. [2021-07-09 18:27:24,048 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10659 transitions. Word has length 29 [2021-07-09 18:27:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10659 transitions. [2021-07-09 18:27:24,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10659 transitions. [2021-07-09 18:27:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:24,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:24,052 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:24,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:24,253 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1568449412, now seen corresponding path program 186 times [2021-07-09 18:27:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806029015] [2021-07-09 18:27:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:24,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806029015] [2021-07-09 18:27:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806029015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:24,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777892806] [2021-07-09 18:27:24,532 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:24,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:27:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:25,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777892806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:25,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:25,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105566960] [2021-07-09 18:27:25,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:25,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:25,214 INFO L87 Difference]: Start difference. First operand 2342 states and 10659 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:25,692 INFO L93 Difference]: Finished difference Result 2387 states and 10797 transitions. [2021-07-09 18:27:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:27:25,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:25,698 INFO L225 Difference]: With dead ends: 2387 [2021-07-09 18:27:25,698 INFO L226 Difference]: Without dead ends: 2382 [2021-07-09 18:27:25,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:27:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-07-09 18:27:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2340. [2021-07-09 18:27:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 4.555365540829414) internal successors, (10655), 2339 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 10655 transitions. [2021-07-09 18:27:25,734 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 10655 transitions. Word has length 29 [2021-07-09 18:27:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:25,734 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 10655 transitions. [2021-07-09 18:27:25,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 10655 transitions. [2021-07-09 18:27:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:25,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:25,738 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:25,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-07-09 18:27:25,939 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -345083362, now seen corresponding path program 187 times [2021-07-09 18:27:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:25,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140928395] [2021-07-09 18:27:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:26,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140928395] [2021-07-09 18:27:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140928395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477826838] [2021-07-09 18:27:26,237 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:27:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:27,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477826838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:27,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:27,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:27,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950298741] [2021-07-09 18:27:27,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:27,161 INFO L87 Difference]: Start difference. First operand 2340 states and 10655 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:27,729 INFO L93 Difference]: Finished difference Result 2400 states and 10829 transitions. [2021-07-09 18:27:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:27:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:27,735 INFO L225 Difference]: With dead ends: 2400 [2021-07-09 18:27:27,735 INFO L226 Difference]: Without dead ends: 2395 [2021-07-09 18:27:27,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1359.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:27:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-07-09 18:27:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2347. [2021-07-09 18:27:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.549872122762149) internal successors, (10674), 2346 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 10674 transitions. [2021-07-09 18:27:27,770 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 10674 transitions. Word has length 29 [2021-07-09 18:27:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:27,770 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 10674 transitions. [2021-07-09 18:27:27,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 10674 transitions. [2021-07-09 18:27:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:27,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:27,774 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:27,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:27,974 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1330094878, now seen corresponding path program 188 times [2021-07-09 18:27:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:27,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586066373] [2021-07-09 18:27:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:28,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586066373] [2021-07-09 18:27:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586066373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207037245] [2021-07-09 18:27:28,259 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:28,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:28,738 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 18:27:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:29,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207037245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:29,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:29,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:29,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5135705] [2021-07-09 18:27:29,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:29,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:29,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:29,094 INFO L87 Difference]: Start difference. First operand 2347 states and 10674 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:29,677 INFO L93 Difference]: Finished difference Result 2388 states and 10783 transitions. [2021-07-09 18:27:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:27:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:29,683 INFO L225 Difference]: With dead ends: 2388 [2021-07-09 18:27:29,683 INFO L226 Difference]: Without dead ends: 2381 [2021-07-09 18:27:29,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:27:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-07-09 18:27:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-07-09 18:27:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.5489778534923335) internal successors, (10681), 2348 states have internal predecessors, (10681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10681 transitions. [2021-07-09 18:27:29,718 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10681 transitions. Word has length 29 [2021-07-09 18:27:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:29,718 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10681 transitions. [2021-07-09 18:27:29,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10681 transitions. [2021-07-09 18:27:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:29,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:29,722 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:29,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:29,923 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash 762815330, now seen corresponding path program 189 times [2021-07-09 18:27:29,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:29,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049259845] [2021-07-09 18:27:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:30,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049259845] [2021-07-09 18:27:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049259845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755531990] [2021-07-09 18:27:30,240 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:30,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:27:30,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:31,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755531990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:31,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:31,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:31,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053739279] [2021-07-09 18:27:31,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:31,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:31,225 INFO L87 Difference]: Start difference. First operand 2349 states and 10681 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:32,197 INFO L93 Difference]: Finished difference Result 2416 states and 10917 transitions. [2021-07-09 18:27:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:27:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:32,203 INFO L225 Difference]: With dead ends: 2416 [2021-07-09 18:27:32,203 INFO L226 Difference]: Without dead ends: 2406 [2021-07-09 18:27:32,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1741.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:27:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-07-09 18:27:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2356. [2021-07-09 18:27:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 4.548619957537155) internal successors, (10712), 2355 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 10712 transitions. [2021-07-09 18:27:32,242 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 10712 transitions. Word has length 29 [2021-07-09 18:27:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 10712 transitions. [2021-07-09 18:27:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 10712 transitions. [2021-07-09 18:27:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:32,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:32,246 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:32,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-07-09 18:27:32,446 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 659784136, now seen corresponding path program 190 times [2021-07-09 18:27:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:32,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521955897] [2021-07-09 18:27:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:27:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521955897] [2021-07-09 18:27:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521955897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218520825] [2021-07-09 18:27:32,604 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:32,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:27:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:32,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:32,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:32,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:32,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:33,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:33,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:27:33,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:85 [2021-07-09 18:27:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:27:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218520825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:33,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:33,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-07-09 18:27:33,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787614017] [2021-07-09 18:27:33,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:33,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:33,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:33,470 INFO L87 Difference]: Start difference. First operand 2356 states and 10712 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:33,844 INFO L93 Difference]: Finished difference Result 3321 states and 14808 transitions. [2021-07-09 18:27:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:27:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 [2021-07-09 18:27:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:33,853 INFO L225 Difference]: With dead ends: 3321 [2021-07-09 18:27:33,853 INFO L226 Difference]: Without dead ends: 3288 [2021-07-09 18:27:33,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-07-09 18:27:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2396. [2021-07-09 18:27:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 4.583298538622129) internal successors, (10977), 2395 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 10977 transitions. [2021-07-09 18:27:33,897 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 10977 transitions. Word has length 29 [2021-07-09 18:27:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:33,897 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 10977 transitions. [2021-07-09 18:27:33,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 10977 transitions. [2021-07-09 18:27:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:33,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:33,901 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:34,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:34,102 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1649573022, now seen corresponding path program 191 times [2021-07-09 18:27:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:34,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192044511] [2021-07-09 18:27:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:34,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192044511] [2021-07-09 18:27:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192044511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098483647] [2021-07-09 18:27:34,504 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:34,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:27:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:34,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:35,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098483647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:35,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364705980] [2021-07-09 18:27:35,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:35,599 INFO L87 Difference]: Start difference. First operand 2396 states and 10977 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:36,127 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:27:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:36,342 INFO L93 Difference]: Finished difference Result 2468 states and 11183 transitions. [2021-07-09 18:27:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:27:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:36,350 INFO L225 Difference]: With dead ends: 2468 [2021-07-09 18:27:36,350 INFO L226 Difference]: Without dead ends: 2452 [2021-07-09 18:27:36,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1662.9ms TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:27:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-07-09 18:27:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2414. [2021-07-09 18:27:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.571073352673021) internal successors, (11030), 2413 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 11030 transitions. [2021-07-09 18:27:36,386 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 11030 transitions. Word has length 29 [2021-07-09 18:27:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:36,386 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 11030 transitions. [2021-07-09 18:27:36,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 11030 transitions. [2021-07-09 18:27:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:36,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:36,390 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:36,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-09 18:27:36,591 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:36,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368124, now seen corresponding path program 192 times [2021-07-09 18:27:36,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:36,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197037356] [2021-07-09 18:27:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197037356] [2021-07-09 18:27:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197037356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:37,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272384620] [2021-07-09 18:27:37,059 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:37,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:27:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:37,685 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:27:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272384620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:38,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:38,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931856752] [2021-07-09 18:27:38,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:38,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:38,062 INFO L87 Difference]: Start difference. First operand 2414 states and 11030 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,011 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-07-09 18:27:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:39,432 INFO L93 Difference]: Finished difference Result 2778 states and 12392 transitions. [2021-07-09 18:27:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:27:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:39,439 INFO L225 Difference]: With dead ends: 2778 [2021-07-09 18:27:39,439 INFO L226 Difference]: Without dead ends: 2763 [2021-07-09 18:27:39,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2200.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:27:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-07-09 18:27:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2476. [2021-07-09 18:27:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.586262626262626) internal successors, (11351), 2475 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 11351 transitions. [2021-07-09 18:27:39,481 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 11351 transitions. Word has length 29 [2021-07-09 18:27:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:39,481 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 11351 transitions. [2021-07-09 18:27:39,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 11351 transitions. [2021-07-09 18:27:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:27:39,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:39,485 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:39,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:39,686 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1317777476, now seen corresponding path program 193 times [2021-07-09 18:27:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:39,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840310574] [2021-07-09 18:27:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:39,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840310574] [2021-07-09 18:27:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840310574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620920159] [2021-07-09 18:27:39,942 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:27:39,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:40,556 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:27:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:41,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620920159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:41,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:41,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:27:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669440658] [2021-07-09 18:27:41,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:27:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:27:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:27:41,032 INFO L87 Difference]: Start difference. First operand 2476 states and 11351 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:41,814 INFO L93 Difference]: Finished difference Result 2717 states and 12214 transitions. [2021-07-09 18:27:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:27:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-07-09 18:27:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:41,821 INFO L225 Difference]: With dead ends: 2717 [2021-07-09 18:27:41,821 INFO L226 Difference]: Without dead ends: 2698 [2021-07-09 18:27:41,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1517.6ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:27:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-07-09 18:27:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2508. [2021-07-09 18:27:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 4.594335859593139) internal successors, (11518), 2507 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 11518 transitions. [2021-07-09 18:27:41,862 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 11518 transitions. Word has length 29 [2021-07-09 18:27:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:41,862 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 11518 transitions. [2021-07-09 18:27:41,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 11518 transitions. [2021-07-09 18:27:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:41,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:41,866 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:42,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-07-09 18:27:42,066 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1438777063, now seen corresponding path program 194 times [2021-07-09 18:27:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53732384] [2021-07-09 18:27:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53732384] [2021-07-09 18:27:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53732384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621642621] [2021-07-09 18:27:42,349 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:42,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:42,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:27:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:42,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:42,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:42,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:43,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:43,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:43,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:43,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:43,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:43,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:27:43,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-07-09 18:27:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:27:43,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621642621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:43,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:43,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-07-09 18:27:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911221860] [2021-07-09 18:27:43,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:27:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:27:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:43,166 INFO L87 Difference]: Start difference. First operand 2508 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:44,595 INFO L93 Difference]: Finished difference Result 5624 states and 23716 transitions. [2021-07-09 18:27:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:44,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 [2021-07-09 18:27:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:44,609 INFO L225 Difference]: With dead ends: 5624 [2021-07-09 18:27:44,609 INFO L226 Difference]: Without dead ends: 5507 [2021-07-09 18:27:44,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1638.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:27:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-09 18:27:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 2890. [2021-07-09 18:27:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 4.747663551401869) internal successors, (13716), 2889 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 13716 transitions. [2021-07-09 18:27:44,681 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 13716 transitions. Word has length 30 [2021-07-09 18:27:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:44,681 INFO L482 AbstractCegarLoop]: Abstraction has 2890 states and 13716 transitions. [2021-07-09 18:27:44,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 13716 transitions. [2021-07-09 18:27:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:44,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:44,685 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:44,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:44,889 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:44,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1972399915, now seen corresponding path program 195 times [2021-07-09 18:27:44,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:44,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581606520] [2021-07-09 18:27:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:45,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581606520] [2021-07-09 18:27:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581606520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:45,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42977785] [2021-07-09 18:27:45,379 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:45,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:27:45,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:45,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:46,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42977785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:46,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:46,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:27:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281781128] [2021-07-09 18:27:46,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:46,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:46,386 INFO L87 Difference]: Start difference. First operand 2890 states and 13716 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:47,051 INFO L93 Difference]: Finished difference Result 2970 states and 13926 transitions. [2021-07-09 18:27:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:27:47,051 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:27:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:47,059 INFO L225 Difference]: With dead ends: 2970 [2021-07-09 18:27:47,059 INFO L226 Difference]: Without dead ends: 2942 [2021-07-09 18:27:47,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1663.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:27:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-09 18:27:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2916. [2021-07-09 18:27:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-07-09 18:27:47,116 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-07-09 18:27:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:47,116 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-07-09 18:27:47,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-07-09 18:27:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:47,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:47,121 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:47,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-07-09 18:27:47,321 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1663574255, now seen corresponding path program 196 times [2021-07-09 18:27:47,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:47,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976766385] [2021-07-09 18:27:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:47,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976766385] [2021-07-09 18:27:47,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976766385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205835389] [2021-07-09 18:27:47,788 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:47,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:47,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:47,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:48,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 18:27:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205835389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:27:48,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011746367] [2021-07-09 18:27:48,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:48,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:48,845 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:49,474 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:27:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:49,685 INFO L93 Difference]: Finished difference Result 2973 states and 13938 transitions. [2021-07-09 18:27:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:27:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:27:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:49,692 INFO L225 Difference]: With dead ends: 2973 [2021-07-09 18:27:49,692 INFO L226 Difference]: Without dead ends: 2964 [2021-07-09 18:27:49,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1726.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:27:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-07-09 18:27:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2916. [2021-07-09 18:27:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-07-09 18:27:49,737 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-07-09 18:27:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:49,737 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-07-09 18:27:49,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-07-09 18:27:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:49,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:49,742 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:49,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:49,942 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash -152141107, now seen corresponding path program 197 times [2021-07-09 18:27:49,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:49,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955193188] [2021-07-09 18:27:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:50,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955193188] [2021-07-09 18:27:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955193188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061759507] [2021-07-09 18:27:50,232 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:50,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:27:50,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:50,627 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 18:27:50,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:50,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:50,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:50,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:51,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:51,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:27:51,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:51,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:27:51,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-07-09 18:27:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:27:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061759507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:51,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:51,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-07-09 18:27:51,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272169636] [2021-07-09 18:27:51,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:27:51,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:27:51,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:27:51,222 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:51,765 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-09 18:27:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:52,137 INFO L93 Difference]: Finished difference Result 2877 states and 13430 transitions. [2021-07-09 18:27:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:27:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 30 [2021-07-09 18:27:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:52,145 INFO L225 Difference]: With dead ends: 2877 [2021-07-09 18:27:52,145 INFO L226 Difference]: Without dead ends: 2867 [2021-07-09 18:27:52,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1545.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:27:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-07-09 18:27:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2833. [2021-07-09 18:27:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 4.709039548022599) internal successors, (13336), 2832 states have internal predecessors, (13336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 13336 transitions. [2021-07-09 18:27:52,216 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 13336 transitions. Word has length 30 [2021-07-09 18:27:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:52,216 INFO L482 AbstractCegarLoop]: Abstraction has 2833 states and 13336 transitions. [2021-07-09 18:27:52,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 13336 transitions. [2021-07-09 18:27:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:52,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:52,220 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:52,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:52,421 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash 529015159, now seen corresponding path program 198 times [2021-07-09 18:27:52,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:52,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896246873] [2021-07-09 18:27:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:52,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:52,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896246873] [2021-07-09 18:27:52,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896246873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:52,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174153319] [2021-07-09 18:27:52,717 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:52,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:27:52,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:53,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174153319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:53,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:53,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:27:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243132226] [2021-07-09 18:27:53,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:53,612 INFO L87 Difference]: Start difference. First operand 2833 states and 13336 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:54,702 INFO L93 Difference]: Finished difference Result 2924 states and 13557 transitions. [2021-07-09 18:27:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:27:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:27:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:54,708 INFO L225 Difference]: With dead ends: 2924 [2021-07-09 18:27:54,708 INFO L226 Difference]: Without dead ends: 2909 [2021-07-09 18:27:54,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1724.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:27:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-07-09 18:27:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2842. [2021-07-09 18:27:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 4.702569517775431) internal successors, (13360), 2841 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 13360 transitions. [2021-07-09 18:27:54,755 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 13360 transitions. Word has length 30 [2021-07-09 18:27:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:54,755 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 13360 transitions. [2021-07-09 18:27:54,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 13360 transitions. [2021-07-09 18:27:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:54,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:54,759 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:54,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:54,960 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2045937511, now seen corresponding path program 199 times [2021-07-09 18:27:54,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:54,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471869013] [2021-07-09 18:27:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:55,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:55,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471869013] [2021-07-09 18:27:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471869013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311804556] [2021-07-09 18:27:55,246 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:55,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:56,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311804556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:56,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:56,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:27:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924289015] [2021-07-09 18:27:56,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:56,124 INFO L87 Difference]: Start difference. First operand 2842 states and 13360 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:56,585 INFO L93 Difference]: Finished difference Result 2998 states and 13825 transitions. [2021-07-09 18:27:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:27:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:27:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:56,592 INFO L225 Difference]: With dead ends: 2998 [2021-07-09 18:27:56,592 INFO L226 Difference]: Without dead ends: 2980 [2021-07-09 18:27:56,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1175.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:27:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-07-09 18:27:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2021-07-09 18:27:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.696927374301676) internal successors, (13452), 2864 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13452 transitions. [2021-07-09 18:27:56,634 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13452 transitions. Word has length 30 [2021-07-09 18:27:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:56,634 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13452 transitions. [2021-07-09 18:27:56,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13452 transitions. [2021-07-09 18:27:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:56,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:56,639 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:56,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:56,839 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:56,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1843232981, now seen corresponding path program 200 times [2021-07-09 18:27:56,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:56,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054529023] [2021-07-09 18:27:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:57,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054529023] [2021-07-09 18:27:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054529023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686001557] [2021-07-09 18:27:57,374 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:57,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:57,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:58,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686001557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:58,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:58,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:27:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358465372] [2021-07-09 18:27:58,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:58,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:58,321 INFO L87 Difference]: Start difference. First operand 2865 states and 13452 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:59,110 INFO L93 Difference]: Finished difference Result 2907 states and 13565 transitions. [2021-07-09 18:27:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:27:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:27:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:59,117 INFO L225 Difference]: With dead ends: 2907 [2021-07-09 18:27:59,117 INFO L226 Difference]: Without dead ends: 2898 [2021-07-09 18:27:59,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1702.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:27:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-07-09 18:27:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2860. [2021-07-09 18:27:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 4.7037425673312345) internal successors, (13448), 2859 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 13448 transitions. [2021-07-09 18:27:59,161 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 13448 transitions. Word has length 30 [2021-07-09 18:27:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:59,161 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 13448 transitions. [2021-07-09 18:27:59,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 13448 transitions. [2021-07-09 18:27:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:59,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:59,166 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:59,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-07-09 18:27:59,366 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2006531273, now seen corresponding path program 201 times [2021-07-09 18:27:59,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:59,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068001257] [2021-07-09 18:27:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:59,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:59,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068001257] [2021-07-09 18:27:59,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068001257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:59,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139261826] [2021-07-09 18:27:59,716 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:59,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:27:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:59,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:00,167 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 18:28:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:00,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139261826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:00,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:00,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718605259] [2021-07-09 18:28:00,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:00,579 INFO L87 Difference]: Start difference. First operand 2860 states and 13448 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:01,235 INFO L93 Difference]: Finished difference Result 3156 states and 14386 transitions. [2021-07-09 18:28:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:01,242 INFO L225 Difference]: With dead ends: 3156 [2021-07-09 18:28:01,243 INFO L226 Difference]: Without dead ends: 3137 [2021-07-09 18:28:01,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1285.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:28:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-07-09 18:28:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2892. [2021-07-09 18:28:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 4.698374264960221) internal successors, (13583), 2891 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 13583 transitions. [2021-07-09 18:28:01,315 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 13583 transitions. Word has length 30 [2021-07-09 18:28:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:01,316 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 13583 transitions. [2021-07-09 18:28:01,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 13583 transitions. [2021-07-09 18:28:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:01,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:01,320 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:01,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:01,522 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 472720661, now seen corresponding path program 202 times [2021-07-09 18:28:01,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:01,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691956780] [2021-07-09 18:28:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:01,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691956780] [2021-07-09 18:28:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691956780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328026997] [2021-07-09 18:28:01,797 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:01,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:28:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:02,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:02,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:02,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:02,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:02,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:02,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:02,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:02,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:02,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:28:02,258 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:81 [2021-07-09 18:28:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:28:02,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328026997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:02,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:02,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-07-09 18:28:02,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359331111] [2021-07-09 18:28:02,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:28:02,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:28:02,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:28:02,383 INFO L87 Difference]: Start difference. First operand 2892 states and 13583 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:07,202 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-09 18:28:11,349 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 18:28:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:11,739 INFO L93 Difference]: Finished difference Result 3764 states and 16651 transitions. [2021-07-09 18:28:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:28:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 30 [2021-07-09 18:28:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:11,748 INFO L225 Difference]: With dead ends: 3764 [2021-07-09 18:28:11,748 INFO L226 Difference]: Without dead ends: 3719 [2021-07-09 18:28:11,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9502.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:28:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-07-09 18:28:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3063. [2021-07-09 18:28:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.732854343566297) internal successors, (14492), 3062 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 14492 transitions. [2021-07-09 18:28:11,804 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 14492 transitions. Word has length 30 [2021-07-09 18:28:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:11,804 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 14492 transitions. [2021-07-09 18:28:11,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 14492 transitions. [2021-07-09 18:28:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:11,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:11,809 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:12,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:12,009 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -968323313, now seen corresponding path program 203 times [2021-07-09 18:28:12,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:12,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55935523] [2021-07-09 18:28:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:12,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:12,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55935523] [2021-07-09 18:28:12,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55935523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:12,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299646244] [2021-07-09 18:28:12,334 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:12,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:28:12,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:28:12,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:12,897 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-09 18:28:13,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:13,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:13,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:13,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:13,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:13,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:13,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:13,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:13,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:13,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-09 18:28:13,207 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:133, output treesize:105 [2021-07-09 18:28:15,333 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 18:28:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:28:15,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299646244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:15,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:15,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-07-09 18:28:15,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873528020] [2021-07-09 18:28:15,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:28:15,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:15,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:28:15,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:28:15,390 INFO L87 Difference]: Start difference. First operand 3063 states and 14492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:18,098 INFO L93 Difference]: Finished difference Result 3155 states and 14639 transitions. [2021-07-09 18:28:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:28:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 30 [2021-07-09 18:28:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:18,105 INFO L225 Difference]: With dead ends: 3155 [2021-07-09 18:28:18,105 INFO L226 Difference]: Without dead ends: 3139 [2021-07-09 18:28:18,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3356.7ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:28:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-07-09 18:28:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3053. [2021-07-09 18:28:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 4.734272608125819) internal successors, (14449), 3052 states have internal predecessors, (14449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 14449 transitions. [2021-07-09 18:28:18,152 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 14449 transitions. Word has length 30 [2021-07-09 18:28:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:18,153 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 14449 transitions. [2021-07-09 18:28:18,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 14449 transitions. [2021-07-09 18:28:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:18,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:18,157 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:18,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:18,358 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash -805587235, now seen corresponding path program 204 times [2021-07-09 18:28:18,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:18,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961273783] [2021-07-09 18:28:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:18,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961273783] [2021-07-09 18:28:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961273783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634720283] [2021-07-09 18:28:18,805 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:18,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:28:18,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:28:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:19,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634720283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:19,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:19,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:19,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591860138] [2021-07-09 18:28:19,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:19,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:19,600 INFO L87 Difference]: Start difference. First operand 3053 states and 14449 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:21,260 INFO L93 Difference]: Finished difference Result 3587 states and 16130 transitions. [2021-07-09 18:28:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:28:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:21,270 INFO L225 Difference]: With dead ends: 3587 [2021-07-09 18:28:21,270 INFO L226 Difference]: Without dead ends: 3548 [2021-07-09 18:28:21,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2124.8ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:28:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-07-09 18:28:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3155. [2021-07-09 18:28:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 4.734939759036145) internal successors, (14934), 3154 states have internal predecessors, (14934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 14934 transitions. [2021-07-09 18:28:21,328 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 14934 transitions. Word has length 30 [2021-07-09 18:28:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:21,328 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 14934 transitions. [2021-07-09 18:28:21,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 14934 transitions. [2021-07-09 18:28:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:21,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:21,333 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:21,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-07-09 18:28:21,533 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:21,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1211384039, now seen corresponding path program 205 times [2021-07-09 18:28:21,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:21,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743135369] [2021-07-09 18:28:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743135369] [2021-07-09 18:28:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743135369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518314594] [2021-07-09 18:28:21,996 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:28:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:22,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518314594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:22,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:22,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:22,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250021754] [2021-07-09 18:28:22,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:22,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:22,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:22,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:22,976 INFO L87 Difference]: Start difference. First operand 3155 states and 14934 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:23,922 INFO L93 Difference]: Finished difference Result 3231 states and 15150 transitions. [2021-07-09 18:28:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:28:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:23,930 INFO L225 Difference]: With dead ends: 3231 [2021-07-09 18:28:23,930 INFO L226 Difference]: Without dead ends: 3213 [2021-07-09 18:28:23,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1793.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:28:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-07-09 18:28:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3160. [2021-07-09 18:28:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 4.733459955682178) internal successors, (14953), 3159 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 14953 transitions. [2021-07-09 18:28:23,982 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 14953 transitions. Word has length 30 [2021-07-09 18:28:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:23,982 INFO L482 AbstractCegarLoop]: Abstraction has 3160 states and 14953 transitions. [2021-07-09 18:28:23,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 14953 transitions. [2021-07-09 18:28:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:23,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:23,987 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:24,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-09 18:28:24,188 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:24,188 INFO L82 PathProgramCache]: Analyzing trace with hash 308768783, now seen corresponding path program 206 times [2021-07-09 18:28:24,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:24,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512255913] [2021-07-09 18:28:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:28:24,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:24,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512255913] [2021-07-09 18:28:24,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512255913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:24,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409069610] [2021-07-09 18:28:24,353 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:24,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:28:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:25,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:25,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:25,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:25,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:25,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:25,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:25,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-09 18:28:25,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-09 18:28:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:28:25,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409069610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:25,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:25,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-07-09 18:28:25,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463113352] [2021-07-09 18:28:25,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:25,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:25,305 INFO L87 Difference]: Start difference. First operand 3160 states and 14953 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:25,773 INFO L93 Difference]: Finished difference Result 3222 states and 15004 transitions. [2021-07-09 18:28:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:28:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-07-09 18:28:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:25,781 INFO L225 Difference]: With dead ends: 3222 [2021-07-09 18:28:25,781 INFO L226 Difference]: Without dead ends: 3214 [2021-07-09 18:28:25,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 921.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:28:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-07-09 18:28:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3123. [2021-07-09 18:28:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 4.721652786675208) internal successors, (14741), 3122 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 14741 transitions. [2021-07-09 18:28:25,832 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 14741 transitions. Word has length 30 [2021-07-09 18:28:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:25,832 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 14741 transitions. [2021-07-09 18:28:25,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 14741 transitions. [2021-07-09 18:28:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:25,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:25,837 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:26,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:26,038 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 65708057, now seen corresponding path program 207 times [2021-07-09 18:28:26,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:26,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154974141] [2021-07-09 18:28:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:26,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154974141] [2021-07-09 18:28:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154974141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857267314] [2021-07-09 18:28:26,431 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:26,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:28:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:28:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:26,947 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:28:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:27,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857267314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:27,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:27,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814469055] [2021-07-09 18:28:27,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:27,347 INFO L87 Difference]: Start difference. First operand 3123 states and 14741 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:27,853 INFO L93 Difference]: Finished difference Result 3173 states and 14878 transitions. [2021-07-09 18:28:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:28:27,853 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:27,863 INFO L225 Difference]: With dead ends: 3173 [2021-07-09 18:28:27,863 INFO L226 Difference]: Without dead ends: 3164 [2021-07-09 18:28:27,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1278.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:28:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-07-09 18:28:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3120. [2021-07-09 18:28:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 4.727476755370311) internal successors, (14745), 3119 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 14745 transitions. [2021-07-09 18:28:27,946 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 14745 transitions. Word has length 30 [2021-07-09 18:28:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:27,946 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 14745 transitions. [2021-07-09 18:28:27,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 14745 transitions. [2021-07-09 18:28:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:27,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:27,951 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:28,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-07-09 18:28:28,157 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash -340088747, now seen corresponding path program 208 times [2021-07-09 18:28:28,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:28,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298114165] [2021-07-09 18:28:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:28,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:28,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298114165] [2021-07-09 18:28:28,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298114165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:28,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466668719] [2021-07-09 18:28:28,462 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:28,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:28,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:28,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:28:28,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:29,009 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 18:28:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:29,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466668719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:29,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:29,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:29,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552831564] [2021-07-09 18:28:29,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:29,535 INFO L87 Difference]: Start difference. First operand 3120 states and 14745 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:30,374 INFO L93 Difference]: Finished difference Result 3224 states and 15081 transitions. [2021-07-09 18:28:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:28:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:30,382 INFO L225 Difference]: With dead ends: 3224 [2021-07-09 18:28:30,382 INFO L226 Difference]: Without dead ends: 3215 [2021-07-09 18:28:30,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1626.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-07-09 18:28:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3107. [2021-07-09 18:28:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 4.74275595621378) internal successors, (14731), 3106 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 14731 transitions. [2021-07-09 18:28:30,433 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 14731 transitions. Word has length 30 [2021-07-09 18:28:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:30,433 INFO L482 AbstractCegarLoop]: Abstraction has 3107 states and 14731 transitions. [2021-07-09 18:28:30,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 14731 transitions. [2021-07-09 18:28:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:30,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:30,438 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:30,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:30,639 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1642624171, now seen corresponding path program 209 times [2021-07-09 18:28:30,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:30,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287352097] [2021-07-09 18:28:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:28:30,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:30,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287352097] [2021-07-09 18:28:30,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287352097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147330267] [2021-07-09 18:28:30,924 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:30,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:28:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:28:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:31,383 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:28:32,048 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-07-09 18:28:32,208 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-09 18:28:32,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:32,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:32,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:32,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:32,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:28:32,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:157, output treesize:129 [2021-07-09 18:28:38,746 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:28:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:38,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147330267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:38,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:38,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-07-09 18:28:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78351181] [2021-07-09 18:28:38,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=591, Unknown=1, NotChecked=0, Total=702 [2021-07-09 18:28:38,829 INFO L87 Difference]: Start difference. First operand 3107 states and 14731 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-07-09 18:28:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:49,387 INFO L93 Difference]: Finished difference Result 3919 states and 17589 transitions. [2021-07-09 18:28:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 [2021-07-09 18:28:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:49,398 INFO L225 Difference]: With dead ends: 3919 [2021-07-09 18:28:49,398 INFO L226 Difference]: Without dead ends: 3898 [2021-07-09 18:28:49,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 7942.8ms TimeCoverageRelationStatistics Valid=197, Invalid=992, Unknown=1, NotChecked=0, Total=1190 [2021-07-09 18:28:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-07-09 18:28:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2894. [2021-07-09 18:28:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 4.713100587625302) internal successors, (13635), 2893 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 13635 transitions. [2021-07-09 18:28:49,454 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 13635 transitions. Word has length 30 [2021-07-09 18:28:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:49,454 INFO L482 AbstractCegarLoop]: Abstraction has 2894 states and 13635 transitions. [2021-07-09 18:28:49,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-07-09 18:28:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 13635 transitions. [2021-07-09 18:28:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:49,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:49,459 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:49,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-07-09 18:28:49,659 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:49,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2118720273, now seen corresponding path program 210 times [2021-07-09 18:28:49,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:49,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017506382] [2021-07-09 18:28:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:50,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:50,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017506382] [2021-07-09 18:28:50,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017506382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:50,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920533673] [2021-07-09 18:28:50,017 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:50,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:28:50,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:51,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920533673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:51,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:51,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:51,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36323791] [2021-07-09 18:28:51,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:51,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:51,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:51,053 INFO L87 Difference]: Start difference. First operand 2894 states and 13635 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:51,533 INFO L93 Difference]: Finished difference Result 2935 states and 13749 transitions. [2021-07-09 18:28:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:28:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:51,543 INFO L225 Difference]: With dead ends: 2935 [2021-07-09 18:28:51,543 INFO L226 Difference]: Without dead ends: 2927 [2021-07-09 18:28:51,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1290.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:28:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-07-09 18:28:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2884. [2021-07-09 18:28:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 4.722858133888311) internal successors, (13616), 2883 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 13616 transitions. [2021-07-09 18:28:51,601 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 13616 transitions. Word has length 30 [2021-07-09 18:28:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:51,601 INFO L482 AbstractCegarLoop]: Abstraction has 2884 states and 13616 transitions. [2021-07-09 18:28:51,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 13616 transitions. [2021-07-09 18:28:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:51,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:51,605 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:51,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-07-09 18:28:51,806 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1459727147, now seen corresponding path program 211 times [2021-07-09 18:28:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133773810] [2021-07-09 18:28:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:52,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:52,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133773810] [2021-07-09 18:28:52,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133773810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:52,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447478429] [2021-07-09 18:28:52,326 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:52,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:28:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:52,893 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:28:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:53,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447478429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:53,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:53,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:53,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988441220] [2021-07-09 18:28:53,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:53,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:53,360 INFO L87 Difference]: Start difference. First operand 2884 states and 13616 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:54,383 INFO L93 Difference]: Finished difference Result 2956 states and 13808 transitions. [2021-07-09 18:28:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:28:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:54,389 INFO L225 Difference]: With dead ends: 2956 [2021-07-09 18:28:54,389 INFO L226 Difference]: Without dead ends: 2951 [2021-07-09 18:28:54,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1886.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:28:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-07-09 18:28:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2868. [2021-07-09 18:28:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 4.732472968259505) internal successors, (13568), 2867 states have internal predecessors, (13568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 13568 transitions. [2021-07-09 18:28:54,433 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 13568 transitions. Word has length 30 [2021-07-09 18:28:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:54,433 INFO L482 AbstractCegarLoop]: Abstraction has 2868 states and 13568 transitions. [2021-07-09 18:28:54,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 13568 transitions. [2021-07-09 18:28:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:54,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:54,438 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:54,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:54,638 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:54,638 INFO L82 PathProgramCache]: Analyzing trace with hash -355988215, now seen corresponding path program 212 times [2021-07-09 18:28:54,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:54,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115622458] [2021-07-09 18:28:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:28:54,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115622458] [2021-07-09 18:28:54,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115622458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:54,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445421070] [2021-07-09 18:28:54,902 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:54,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:28:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:55,519 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-09 18:28:55,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:55,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:55,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:55,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:55,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:28:55,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:55,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-09 18:28:55,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-09 18:28:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:28:55,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445421070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:55,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:55,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-07-09 18:28:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843505268] [2021-07-09 18:28:55,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:28:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:28:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:28:55,962 INFO L87 Difference]: Start difference. First operand 2868 states and 13568 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:56,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:28:56,857 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-07-09 18:28:57,034 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-07-09 18:28:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:57,213 INFO L93 Difference]: Finished difference Result 3055 states and 13736 transitions. [2021-07-09 18:28:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:28:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 30 [2021-07-09 18:28:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:57,221 INFO L225 Difference]: With dead ends: 3055 [2021-07-09 18:28:57,221 INFO L226 Difference]: Without dead ends: 3013 [2021-07-09 18:28:57,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1812.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-07-09 18:28:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2785. [2021-07-09 18:28:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 4.704741379310345) internal successors, (13098), 2784 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 13098 transitions. [2021-07-09 18:28:57,271 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 13098 transitions. Word has length 30 [2021-07-09 18:28:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:57,272 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 13098 transitions. [2021-07-09 18:28:57,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 13098 transitions. [2021-07-09 18:28:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:57,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:57,277 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:57,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable951 [2021-07-09 18:28:57,481 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 325168051, now seen corresponding path program 213 times [2021-07-09 18:28:57,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:57,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171660137] [2021-07-09 18:28:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:57,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171660137] [2021-07-09 18:28:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171660137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:57,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247205312] [2021-07-09 18:28:57,872 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:57,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:28:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:58,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247205312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:58,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:58,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:28:58,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089689205] [2021-07-09 18:28:58,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:28:58,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:28:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:58,752 INFO L87 Difference]: Start difference. First operand 2785 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:59,420 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:29:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:00,578 INFO L93 Difference]: Finished difference Result 3385 states and 15139 transitions. [2021-07-09 18:29:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:29:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:29:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:00,587 INFO L225 Difference]: With dead ends: 3385 [2021-07-09 18:29:00,587 INFO L226 Difference]: Without dead ends: 3306 [2021-07-09 18:29:00,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2319.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:29:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-07-09 18:29:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2865. [2021-07-09 18:29:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.692039106145251) internal successors, (13438), 2864 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13438 transitions. [2021-07-09 18:29:00,670 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13438 transitions. Word has length 30 [2021-07-09 18:29:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:00,670 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13438 transitions. [2021-07-09 18:29:00,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13438 transitions. [2021-07-09 18:29:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:00,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:00,675 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:00,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-07-09 18:29:00,877 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1822744915, now seen corresponding path program 214 times [2021-07-09 18:29:00,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:00,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249933357] [2021-07-09 18:29:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:01,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249933357] [2021-07-09 18:29:01,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249933357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:01,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340094388] [2021-07-09 18:29:01,192 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:01,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:01,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:29:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:01,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:01,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:01,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:01,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:01,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:01,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:01,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:01,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:01,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:01,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:91 [2021-07-09 18:29:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:01,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340094388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:01,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:01,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:29:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723742420] [2021-07-09 18:29:01,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:29:01,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:01,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:29:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:29:01,926 INFO L87 Difference]: Start difference. First operand 2865 states and 13438 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,023 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:29:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:07,254 INFO L93 Difference]: Finished difference Result 3569 states and 15801 transitions. [2021-07-09 18:29:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:29:07,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 30 [2021-07-09 18:29:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:07,264 INFO L225 Difference]: With dead ends: 3569 [2021-07-09 18:29:07,264 INFO L226 Difference]: Without dead ends: 3527 [2021-07-09 18:29:07,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 5596.9ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:29:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-07-09 18:29:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2982. [2021-07-09 18:29:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.682321368668232) internal successors, (13958), 2981 states have internal predecessors, (13958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13958 transitions. [2021-07-09 18:29:07,320 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13958 transitions. Word has length 30 [2021-07-09 18:29:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:07,320 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 13958 transitions. [2021-07-09 18:29:07,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13958 transitions. [2021-07-09 18:29:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:07,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:07,325 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:07,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:07,525 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:07,526 INFO L82 PathProgramCache]: Analyzing trace with hash 844238639, now seen corresponding path program 215 times [2021-07-09 18:29:07,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:07,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589047877] [2021-07-09 18:29:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:07,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589047877] [2021-07-09 18:29:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589047877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321874528] [2021-07-09 18:29:07,857 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:07,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:29:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321874528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:29:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60427132] [2021-07-09 18:29:08,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:29:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:29:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:29:08,611 INFO L87 Difference]: Start difference. First operand 2982 states and 13958 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:09,142 INFO L93 Difference]: Finished difference Result 3047 states and 14149 transitions. [2021-07-09 18:29:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:29:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:29:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:09,150 INFO L225 Difference]: With dead ends: 3047 [2021-07-09 18:29:09,150 INFO L226 Difference]: Without dead ends: 3042 [2021-07-09 18:29:09,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:29:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-07-09 18:29:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2976. [2021-07-09 18:29:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.68436974789916) internal successors, (13936), 2975 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 13936 transitions. [2021-07-09 18:29:09,198 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 13936 transitions. Word has length 30 [2021-07-09 18:29:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:09,199 INFO L482 AbstractCegarLoop]: Abstraction has 2976 states and 13936 transitions. [2021-07-09 18:29:09,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 13936 transitions. [2021-07-09 18:29:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:09,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:09,203 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:09,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-09 18:29:09,404 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1600927089, now seen corresponding path program 216 times [2021-07-09 18:29:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:09,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164222261] [2021-07-09 18:29:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:09,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:09,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164222261] [2021-07-09 18:29:09,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164222261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:09,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172569992] [2021-07-09 18:29:09,680 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:09,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:29:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:10,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:10,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:10,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:10,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:10,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:10,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:10,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:10,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:10,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:10,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:10,479 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-07-09 18:29:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:10,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172569992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:10,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:10,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:29:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611129237] [2021-07-09 18:29:10,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:29:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:29:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:29:10,614 INFO L87 Difference]: Start difference. First operand 2976 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:11,571 INFO L93 Difference]: Finished difference Result 3127 states and 14283 transitions. [2021-07-09 18:29:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:29:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 30 [2021-07-09 18:29:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:11,579 INFO L225 Difference]: With dead ends: 3127 [2021-07-09 18:29:11,579 INFO L226 Difference]: Without dead ends: 3111 [2021-07-09 18:29:11,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1456.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:29:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-07-09 18:29:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2977. [2021-07-09 18:29:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 4.6875) internal successors, (13950), 2976 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 13950 transitions. [2021-07-09 18:29:11,628 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 13950 transitions. Word has length 30 [2021-07-09 18:29:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:11,628 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 13950 transitions. [2021-07-09 18:29:11,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 13950 transitions. [2021-07-09 18:29:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:11,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:11,633 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:11,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:11,833 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1654264789, now seen corresponding path program 217 times [2021-07-09 18:29:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:11,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833383331] [2021-07-09 18:29:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:12,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833383331] [2021-07-09 18:29:12,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833383331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:12,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279702094] [2021-07-09 18:29:12,247 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:29:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:13,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279702094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:13,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:13,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:29:13,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758566039] [2021-07-09 18:29:13,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:29:13,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:13,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:29:13,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:29:13,102 INFO L87 Difference]: Start difference. First operand 2977 states and 13950 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:14,673 INFO L93 Difference]: Finished difference Result 3332 states and 15161 transitions. [2021-07-09 18:29:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:29:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:29:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:14,681 INFO L225 Difference]: With dead ends: 3332 [2021-07-09 18:29:14,681 INFO L226 Difference]: Without dead ends: 3309 [2021-07-09 18:29:14,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2181.2ms TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:29:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-07-09 18:29:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3028. [2021-07-09 18:29:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 4.686157912124215) internal successors, (14185), 3027 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 14185 transitions. [2021-07-09 18:29:14,735 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 14185 transitions. Word has length 30 [2021-07-09 18:29:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:14,736 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 14185 transitions. [2021-07-09 18:29:14,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:14,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 14185 transitions. [2021-07-09 18:29:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:14,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:14,740 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:14,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-07-09 18:29:14,943 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash -161450573, now seen corresponding path program 218 times [2021-07-09 18:29:14,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:14,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681158020] [2021-07-09 18:29:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:15,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:15,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681158020] [2021-07-09 18:29:15,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681158020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:15,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394485806] [2021-07-09 18:29:15,163 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:15,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:29:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:15,840 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 18:29:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:16,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:16,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:16,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:16,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:16,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:16,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:16,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:16,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:16,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:16,126 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-07-09 18:29:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:29:16,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394485806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:16,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:16,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-07-09 18:29:16,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853399758] [2021-07-09 18:29:16,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:29:16,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:16,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:29:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:29:16,300 INFO L87 Difference]: Start difference. First operand 3028 states and 14185 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,068 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-09 18:29:17,326 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-07-09 18:29:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:17,795 INFO L93 Difference]: Finished difference Result 3185 states and 14482 transitions. [2021-07-09 18:29:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:29:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 30 [2021-07-09 18:29:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:17,803 INFO L225 Difference]: With dead ends: 3185 [2021-07-09 18:29:17,803 INFO L226 Difference]: Without dead ends: 3175 [2021-07-09 18:29:17,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1991.2ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:29:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-07-09 18:29:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3020. [2021-07-09 18:29:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 4.68532626697582) internal successors, (14145), 3019 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 14145 transitions. [2021-07-09 18:29:17,859 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 14145 transitions. Word has length 30 [2021-07-09 18:29:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:17,859 INFO L482 AbstractCegarLoop]: Abstraction has 3020 states and 14145 transitions. [2021-07-09 18:29:17,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 14145 transitions. [2021-07-09 18:29:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:17,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:17,864 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:18,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-07-09 18:29:18,069 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2045182677, now seen corresponding path program 219 times [2021-07-09 18:29:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647455844] [2021-07-09 18:29:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647455844] [2021-07-09 18:29:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647455844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848707338] [2021-07-09 18:29:18,487 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:29:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848707338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:19,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:19,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:29:19,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325743838] [2021-07-09 18:29:19,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:29:19,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:29:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:29:19,348 INFO L87 Difference]: Start difference. First operand 3020 states and 14145 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:20,249 INFO L93 Difference]: Finished difference Result 3462 states and 15765 transitions. [2021-07-09 18:29:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:29:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-07-09 18:29:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:20,258 INFO L225 Difference]: With dead ends: 3462 [2021-07-09 18:29:20,258 INFO L226 Difference]: Without dead ends: 3426 [2021-07-09 18:29:20,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1532.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:29:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-07-09 18:29:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3090. [2021-07-09 18:29:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 4.68824862415021) internal successors, (14482), 3089 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 14482 transitions. [2021-07-09 18:29:20,315 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 14482 transitions. Word has length 30 [2021-07-09 18:29:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:20,315 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 14482 transitions. [2021-07-09 18:29:20,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 14482 transitions. [2021-07-09 18:29:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:20,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:20,320 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:20,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-09 18:29:20,520 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1574669730, now seen corresponding path program 220 times [2021-07-09 18:29:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:20,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745141281] [2021-07-09 18:29:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:21,007 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:29:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:21,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:21,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745141281] [2021-07-09 18:29:21,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745141281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:21,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966556781] [2021-07-09 18:29:21,277 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:21,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:29:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:21,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:21,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:21,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:21,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:21,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:22,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:22,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:22,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:22,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:22,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:22,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-07-09 18:29:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:29:22,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966556781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:22,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:22,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-07-09 18:29:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834340965] [2021-07-09 18:29:22,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:29:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:22,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:29:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:29:22,236 INFO L87 Difference]: Start difference. First operand 3090 states and 14482 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:23,554 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-09 18:29:27,688 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-09 18:29:31,828 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-07-09 18:29:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:32,112 INFO L93 Difference]: Finished difference Result 4299 states and 19280 transitions. [2021-07-09 18:29:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:29:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:29:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:32,123 INFO L225 Difference]: With dead ends: 4299 [2021-07-09 18:29:32,123 INFO L226 Difference]: Without dead ends: 4284 [2021-07-09 18:29:32,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 10525.0ms TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:29:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-07-09 18:29:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3385. [2021-07-09 18:29:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 4.755910165484633) internal successors, (16094), 3384 states have internal predecessors, (16094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 16094 transitions. [2021-07-09 18:29:32,193 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 16094 transitions. Word has length 31 [2021-07-09 18:29:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:32,193 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 16094 transitions. [2021-07-09 18:29:32,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 16094 transitions. [2021-07-09 18:29:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:32,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:32,199 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:32,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable984,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:32,399 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash -501858524, now seen corresponding path program 221 times [2021-07-09 18:29:32,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:32,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104538422] [2021-07-09 18:29:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:32,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104538422] [2021-07-09 18:29:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104538422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285300214] [2021-07-09 18:29:32,785 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:32,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:29:32,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:29:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:33,176 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:29:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:33,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285300214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:33,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:33,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:29:33,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949793215] [2021-07-09 18:29:33,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:29:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:29:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:29:33,769 INFO L87 Difference]: Start difference. First operand 3385 states and 16094 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:34,918 INFO L93 Difference]: Finished difference Result 3784 states and 17341 transitions. [2021-07-09 18:29:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:29:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:29:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:34,928 INFO L225 Difference]: With dead ends: 3784 [2021-07-09 18:29:34,929 INFO L226 Difference]: Without dead ends: 3754 [2021-07-09 18:29:34,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:29:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-07-09 18:29:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3427. [2021-07-09 18:29:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.752189141856392) internal successors, (16281), 3426 states have internal predecessors, (16281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 16281 transitions. [2021-07-09 18:29:35,017 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 16281 transitions. Word has length 31 [2021-07-09 18:29:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:35,017 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 16281 transitions. [2021-07-09 18:29:35,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 16281 transitions. [2021-07-09 18:29:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:35,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:35,023 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:35,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-07-09 18:29:35,223 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:35,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1313452132, now seen corresponding path program 222 times [2021-07-09 18:29:35,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:35,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169084252] [2021-07-09 18:29:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:35,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:35,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169084252] [2021-07-09 18:29:35,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169084252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:35,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311954038] [2021-07-09 18:29:35,579 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:35,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:29:35,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:35,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:35,984 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:29:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311954038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:36,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:36,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:29:36,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611972050] [2021-07-09 18:29:36,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:29:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:29:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:29:36,504 INFO L87 Difference]: Start difference. First operand 3427 states and 16281 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:37,626 INFO L93 Difference]: Finished difference Result 3523 states and 16535 transitions. [2021-07-09 18:29:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:29:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:29:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:37,635 INFO L225 Difference]: With dead ends: 3523 [2021-07-09 18:29:37,635 INFO L226 Difference]: Without dead ends: 3514 [2021-07-09 18:29:37,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1840.1ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:29:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-07-09 18:29:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3416. [2021-07-09 18:29:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 4.759590043923866) internal successors, (16254), 3415 states have internal predecessors, (16254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 16254 transitions. [2021-07-09 18:29:37,709 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 16254 transitions. Word has length 31 [2021-07-09 18:29:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:37,709 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 16254 transitions. [2021-07-09 18:29:37,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 16254 transitions. [2021-07-09 18:29:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:37,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:37,717 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:37,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable994,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:37,925 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -977706982, now seen corresponding path program 223 times [2021-07-09 18:29:37,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:37,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578526972] [2021-07-09 18:29:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:38,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578526972] [2021-07-09 18:29:38,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578526972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:38,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484812879] [2021-07-09 18:29:38,271 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:38,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:29:38,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:38,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:38,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:39,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:39,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:39,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:39,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:39,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:39,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:39,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:39,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:157, output treesize:129 [2021-07-09 18:29:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:39,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484812879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:39,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:39,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:29:39,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561864561] [2021-07-09 18:29:39,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:29:39,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:39,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:29:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:29:39,388 INFO L87 Difference]: Start difference. First operand 3416 states and 16254 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:40,613 INFO L93 Difference]: Finished difference Result 4312 states and 19940 transitions. [2021-07-09 18:29:40,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:29:40,613 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 31 [2021-07-09 18:29:40,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:40,624 INFO L225 Difference]: With dead ends: 4312 [2021-07-09 18:29:40,624 INFO L226 Difference]: Without dead ends: 4297 [2021-07-09 18:29:40,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1724.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:29:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-07-09 18:29:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3442. [2021-07-09 18:29:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 4.745422842197036) internal successors, (16329), 3441 states have internal predecessors, (16329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 16329 transitions. [2021-07-09 18:29:40,697 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 16329 transitions. Word has length 31 [2021-07-09 18:29:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:40,697 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 16329 transitions. [2021-07-09 18:29:40,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 16329 transitions. [2021-07-09 18:29:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:40,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:40,703 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:40,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-09 18:29:40,903 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1892834208, now seen corresponding path program 224 times [2021-07-09 18:29:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:40,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876918613] [2021-07-09 18:29:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:41,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:41,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876918613] [2021-07-09 18:29:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876918613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:41,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972902429] [2021-07-09 18:29:41,304 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:41,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:41,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:41,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:42,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972902429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:42,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:42,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:29:42,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028063105] [2021-07-09 18:29:42,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:29:42,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:42,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:29:42,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:29:42,074 INFO L87 Difference]: Start difference. First operand 3442 states and 16329 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:42,624 INFO L93 Difference]: Finished difference Result 3497 states and 16477 transitions. [2021-07-09 18:29:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:29:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:29:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:42,633 INFO L225 Difference]: With dead ends: 3497 [2021-07-09 18:29:42,633 INFO L226 Difference]: Without dead ends: 3488 [2021-07-09 18:29:42,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1224.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:29:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-07-09 18:29:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3445. [2021-07-09 18:29:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.745354239256678) internal successors, (16343), 3444 states have internal predecessors, (16343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 16343 transitions. [2021-07-09 18:29:42,692 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 16343 transitions. Word has length 31 [2021-07-09 18:29:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:42,692 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 16343 transitions. [2021-07-09 18:29:42,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 16343 transitions. [2021-07-09 18:29:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:42,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:42,698 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:42,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1014 [2021-07-09 18:29:42,898 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:42,898 INFO L82 PathProgramCache]: Analyzing trace with hash 262643294, now seen corresponding path program 225 times [2021-07-09 18:29:42,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:42,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264519234] [2021-07-09 18:29:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:43,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:43,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264519234] [2021-07-09 18:29:43,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264519234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:43,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644293951] [2021-07-09 18:29:43,266 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:43,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:29:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:29:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:43,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:43,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:43,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:43,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:44,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:44,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:44,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:44,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:44,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:44,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:44,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:44,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-07-09 18:29:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:44,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644293951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:44,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:44,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-07-09 18:29:44,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745270171] [2021-07-09 18:29:44,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:29:44,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:29:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:29:44,264 INFO L87 Difference]: Start difference. First operand 3445 states and 16343 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:45,750 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 18:29:49,876 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-07-09 18:29:54,023 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-09 18:29:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:54,325 INFO L93 Difference]: Finished difference Result 6226 states and 27707 transitions. [2021-07-09 18:29:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:29:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 31 [2021-07-09 18:29:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:54,342 INFO L225 Difference]: With dead ends: 6226 [2021-07-09 18:29:54,343 INFO L226 Difference]: Without dead ends: 6145 [2021-07-09 18:29:54,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 10247.0ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:29:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-07-09 18:29:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 3919. [2021-07-09 18:29:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-07-09 18:29:54,437 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-07-09 18:29:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:54,438 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-07-09 18:29:54,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-07-09 18:29:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:54,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:54,444 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:54,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-07-09 18:29:54,645 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:54,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1233841082, now seen corresponding path program 226 times [2021-07-09 18:29:54,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:54,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839332318] [2021-07-09 18:29:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:55,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:55,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839332318] [2021-07-09 18:29:55,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839332318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:55,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950786443] [2021-07-09 18:29:55,073 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:55,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:55,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:29:55,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:56,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950786443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:56,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:56,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:29:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268890416] [2021-07-09 18:29:56,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:29:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:29:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:29:56,073 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:56,733 INFO L93 Difference]: Finished difference Result 3997 states and 19173 transitions. [2021-07-09 18:29:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:29:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:29:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:56,744 INFO L225 Difference]: With dead ends: 3997 [2021-07-09 18:29:56,744 INFO L226 Difference]: Without dead ends: 3984 [2021-07-09 18:29:56,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1503.4ms TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:29:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-07-09 18:29:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3919. [2021-07-09 18:29:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-07-09 18:29:56,815 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-07-09 18:29:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:56,815 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-07-09 18:29:56,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-07-09 18:29:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:29:56,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:56,822 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:57,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-09 18:29:57,022 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 110356286, now seen corresponding path program 227 times [2021-07-09 18:29:57,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:57,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124597602] [2021-07-09 18:29:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:29:57,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:57,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124597602] [2021-07-09 18:29:57,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124597602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:57,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084855089] [2021-07-09 18:29:57,327 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:57,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:29:57,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:29:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:57,913 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-09 18:29:58,234 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_208, client], 1=[node_1]} [2021-07-09 18:29:58,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:58,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:29:58,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:58,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:29:58,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:29:58,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:58,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:58,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-07-09 18:29:58,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-07-09 18:30:02,535 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:30:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:30:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084855089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:02,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:02,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-07-09 18:30:02,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014052938] [2021-07-09 18:30:02,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:30:02,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:30:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=667, Unknown=1, NotChecked=0, Total=756 [2021-07-09 18:30:02,620 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-07-09 18:30:03,082 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-07-09 18:30:07,282 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-09 18:30:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:12,033 INFO L93 Difference]: Finished difference Result 4125 states and 19314 transitions. [2021-07-09 18:30:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:30:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 31 [2021-07-09 18:30:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:12,044 INFO L225 Difference]: With dead ends: 4125 [2021-07-09 18:30:12,044 INFO L226 Difference]: Without dead ends: 4089 [2021-07-09 18:30:12,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 7561.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1402, Unknown=2, NotChecked=0, Total=1560 [2021-07-09 18:30:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-07-09 18:30:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3833. [2021-07-09 18:30:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.840814196242171) internal successors, (18550), 3832 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 18550 transitions. [2021-07-09 18:30:12,113 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 18550 transitions. Word has length 31 [2021-07-09 18:30:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:12,113 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 18550 transitions. [2021-07-09 18:30:12,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-07-09 18:30:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 18550 transitions. [2021-07-09 18:30:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:12,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:12,120 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:12,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-07-09 18:30:12,320 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1439139550, now seen corresponding path program 228 times [2021-07-09 18:30:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:12,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079514913] [2021-07-09 18:30:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:30:12,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:12,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079514913] [2021-07-09 18:30:12,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079514913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:12,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827543624] [2021-07-09 18:30:12,466 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:12,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:30:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:12,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:13,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:30:13,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:30:13,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:13,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:13,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:64, output treesize:50 [2021-07-09 18:30:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827543624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:13,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:13,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-07-09 18:30:13,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914627179] [2021-07-09 18:30:13,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:30:13,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:13,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:30:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:30:13,393 INFO L87 Difference]: Start difference. First operand 3833 states and 18550 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:13,895 INFO L93 Difference]: Finished difference Result 6856 states and 32904 transitions. [2021-07-09 18:30:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:30:13,895 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 31 [2021-07-09 18:30:13,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:13,915 INFO L225 Difference]: With dead ends: 6856 [2021-07-09 18:30:13,915 INFO L226 Difference]: Without dead ends: 6795 [2021-07-09 18:30:13,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:30:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-07-09 18:30:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 4695. [2021-07-09 18:30:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.002556455048999) internal successors, (23482), 4694 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23482 transitions. [2021-07-09 18:30:14,020 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23482 transitions. Word has length 31 [2021-07-09 18:30:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23482 transitions. [2021-07-09 18:30:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23482 transitions. [2021-07-09 18:30:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:14,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:14,028 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:14,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:14,229 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:14,229 INFO L82 PathProgramCache]: Analyzing trace with hash 772594686, now seen corresponding path program 229 times [2021-07-09 18:30:14,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:14,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657598515] [2021-07-09 18:30:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:14,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657598515] [2021-07-09 18:30:14,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657598515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041078654] [2021-07-09 18:30:14,573 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:30:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:15,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041078654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:15,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:15,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045504175] [2021-07-09 18:30:15,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:15,679 INFO L87 Difference]: Start difference. First operand 4695 states and 23482 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:16,362 INFO L93 Difference]: Finished difference Result 4746 states and 23612 transitions. [2021-07-09 18:30:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:30:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:16,375 INFO L225 Difference]: With dead ends: 4746 [2021-07-09 18:30:16,375 INFO L226 Difference]: Without dead ends: 4733 [2021-07-09 18:30:16,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1492.2ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:30:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-07-09 18:30:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4681. [2021-07-09 18:30:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 5.013034188034188) internal successors, (23461), 4680 states have internal predecessors, (23461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 23461 transitions. [2021-07-09 18:30:16,466 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 23461 transitions. Word has length 31 [2021-07-09 18:30:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:16,466 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 23461 transitions. [2021-07-09 18:30:16,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 23461 transitions. [2021-07-09 18:30:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:16,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:16,474 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:16,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-07-09 18:30:16,675 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:16,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1688987100, now seen corresponding path program 230 times [2021-07-09 18:30:16,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:16,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317335560] [2021-07-09 18:30:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:17,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:17,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317335560] [2021-07-09 18:30:17,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317335560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:17,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710518412] [2021-07-09 18:30:17,101 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:17,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:30:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:17,575 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:30:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:18,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710518412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:18,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:18,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:18,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242421664] [2021-07-09 18:30:18,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:18,076 INFO L87 Difference]: Start difference. First operand 4681 states and 23461 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:19,095 INFO L93 Difference]: Finished difference Result 4755 states and 23651 transitions. [2021-07-09 18:30:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:30:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:19,109 INFO L225 Difference]: With dead ends: 4755 [2021-07-09 18:30:19,109 INFO L226 Difference]: Without dead ends: 4742 [2021-07-09 18:30:19,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1685.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:30:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-07-09 18:30:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2021-07-09 18:30:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 5.007027257240204) internal successors, (23513), 4696 states have internal predecessors, (23513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 23513 transitions. [2021-07-09 18:30:19,194 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 23513 transitions. Word has length 31 [2021-07-09 18:30:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:19,194 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 23513 transitions. [2021-07-09 18:30:19,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 23513 transitions. [2021-07-09 18:30:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:19,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:19,203 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:19,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:19,403 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1029993974, now seen corresponding path program 231 times [2021-07-09 18:30:19,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:19,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741190842] [2021-07-09 18:30:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:19,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:19,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741190842] [2021-07-09 18:30:19,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741190842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:19,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143303926] [2021-07-09 18:30:19,721 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:19,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:30:19,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:30:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:20,236 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:30:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:20,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143303926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:20,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:20,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:20,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544515819] [2021-07-09 18:30:20,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:20,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:20,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:20,892 INFO L87 Difference]: Start difference. First operand 4697 states and 23513 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:21,558 INFO L93 Difference]: Finished difference Result 5035 states and 24640 transitions. [2021-07-09 18:30:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:30:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:21,572 INFO L225 Difference]: With dead ends: 5035 [2021-07-09 18:30:21,572 INFO L226 Difference]: Without dead ends: 5011 [2021-07-09 18:30:21,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1562.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:30:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-07-09 18:30:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4691. [2021-07-09 18:30:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 5.010234541577825) internal successors, (23498), 4690 states have internal predecessors, (23498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 23498 transitions. [2021-07-09 18:30:21,663 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 23498 transitions. Word has length 31 [2021-07-09 18:30:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:21,663 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 23498 transitions. [2021-07-09 18:30:21,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 23498 transitions. [2021-07-09 18:30:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:21,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:21,672 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:21,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:21,872 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash 632601598, now seen corresponding path program 232 times [2021-07-09 18:30:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:21,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842099061] [2021-07-09 18:30:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:22,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842099061] [2021-07-09 18:30:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842099061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:22,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258869712] [2021-07-09 18:30:22,274 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:22,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:30:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258869712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:23,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:23,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428611923] [2021-07-09 18:30:23,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:23,354 INFO L87 Difference]: Start difference. First operand 4691 states and 23498 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:23,919 INFO L93 Difference]: Finished difference Result 4753 states and 23660 transitions. [2021-07-09 18:30:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:30:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:23,933 INFO L225 Difference]: With dead ends: 4753 [2021-07-09 18:30:23,933 INFO L226 Difference]: Without dead ends: 4744 [2021-07-09 18:30:23,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:30:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-07-09 18:30:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4695. [2021-07-09 18:30:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.008308478909246) internal successors, (23509), 4694 states have internal predecessors, (23509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23509 transitions. [2021-07-09 18:30:24,020 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23509 transitions. Word has length 31 [2021-07-09 18:30:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:24,020 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23509 transitions. [2021-07-09 18:30:24,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23509 transitions. [2021-07-09 18:30:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:24,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:24,029 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:24,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:24,229 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1503896890, now seen corresponding path program 233 times [2021-07-09 18:30:24,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:24,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059766974] [2021-07-09 18:30:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:24,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:24,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059766974] [2021-07-09 18:30:24,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059766974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:24,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093837053] [2021-07-09 18:30:24,658 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:24,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:30:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:25,196 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:30:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:25,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093837053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:25,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:25,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104086558] [2021-07-09 18:30:25,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:25,709 INFO L87 Difference]: Start difference. First operand 4695 states and 23509 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:26,268 INFO L93 Difference]: Finished difference Result 4748 states and 23630 transitions. [2021-07-09 18:30:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:30:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:26,281 INFO L225 Difference]: With dead ends: 4748 [2021-07-09 18:30:26,282 INFO L226 Difference]: Without dead ends: 4739 [2021-07-09 18:30:26,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1424.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:30:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-07-09 18:30:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4684. [2021-07-09 18:30:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 5.014093529788597) internal successors, (23481), 4683 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 23481 transitions. [2021-07-09 18:30:26,371 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 23481 transitions. Word has length 31 [2021-07-09 18:30:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:26,371 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 23481 transitions. [2021-07-09 18:30:26,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 23481 transitions. [2021-07-09 18:30:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:26,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:26,379 INFO L508 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:26,580 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1809097854, now seen corresponding path program 234 times [2021-07-09 18:30:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:26,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957842398] [2021-07-09 18:30:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:26,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957842398] [2021-07-09 18:30:26,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957842398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399368965] [2021-07-09 18:30:26,902 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:26,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:30:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:30:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:27,487 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 18:30:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399368965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:28,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:28,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:30:28,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071438957] [2021-07-09 18:30:28,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:30:28,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:30:28,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:30:28,081 INFO L87 Difference]: Start difference. First operand 4684 states and 23481 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:28,769 INFO L93 Difference]: Finished difference Result 4790 states and 23786 transitions. [2021-07-09 18:30:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:30:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-07-09 18:30:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:28,783 INFO L225 Difference]: With dead ends: 4790 [2021-07-09 18:30:28,783 INFO L226 Difference]: Without dead ends: 4768 [2021-07-09 18:30:28,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1503.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:30:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-07-09 18:30:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4708. [2021-07-09 18:30:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 5.007435734013172) internal successors, (23570), 4707 states have internal predecessors, (23570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 23570 transitions. [2021-07-09 18:30:28,894 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 23570 transitions. Word has length 31 [2021-07-09 18:30:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:28,894 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 23570 transitions. [2021-07-09 18:30:28,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 23570 transitions. [2021-07-09 18:30:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:30:28,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:28,903 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:29,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-07-09 18:30:29,114 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1256388998, now seen corresponding path program 235 times [2021-07-09 18:30:29,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770412677] [2021-07-09 18:30:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:29,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770412677] [2021-07-09 18:30:29,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770412677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160459910] [2021-07-09 18:30:29,469 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:30:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:30,486 INFO L446 ElimStorePlain]: Different costs {0=[node_2, v_prenex_216], 1=[node_1]} [2021-07-09 18:30:30,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:30:30,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:30:30,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:30:30,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,608 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:30,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:30:30,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:30:30,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:153, output treesize:115 [2021-07-09 18:30:34,748 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 59 [2021-07-09 18:30:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:30:34,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160459910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:34,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:34,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-07-09 18:30:34,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463459996] [2021-07-09 18:30:34,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:30:34,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:30:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=1, NotChecked=0, Total=930 [2021-07-09 18:30:34,829 INFO L87 Difference]: Start difference. First operand 4708 states and 23570 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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) [2021-07-09 18:30:35,823 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 Received shutdown request... [2021-07-09 18:30:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:30:38,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:38,060 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:30:38,063 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:30:38,064 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:30:38,064 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:30:38 BasicIcfg [2021-07-09 18:30:38,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:30:38,065 INFO L168 Benchmark]: Toolchain (without parser) took 822587.78 ms. Allocated memory was 180.4 MB in the beginning and 848.3 MB in the end (delta: 667.9 MB). Free memory was 160.1 MB in the beginning and 421.5 MB in the end (delta: -261.4 MB). Peak memory consumption was 407.3 MB. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 161.4 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.38 ms. Allocated memory is still 180.4 MB. Free memory was 160.0 MB in the beginning and 158.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 ms. Allocated memory is still 180.4 MB. Free memory was 158.5 MB in the beginning and 157.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L168 Benchmark]: RCFGBuilder took 661.15 ms. Allocated memory is still 180.4 MB. Free memory was 157.4 MB in the beginning and 156.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L168 Benchmark]: TraceAbstraction took 821867.44 ms. Allocated memory was 180.4 MB in the beginning and 848.3 MB in the end (delta: 667.9 MB). Free memory was 155.7 MB in the beginning and 421.5 MB in the end (delta: -265.8 MB). Peak memory consumption was 402.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:30:38,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 161.4 MB in the end (delta: 89.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.38 ms. Allocated memory is still 180.4 MB. Free memory was 160.0 MB in the beginning and 158.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.35 ms. Allocated memory is still 180.4 MB. Free memory was 158.5 MB in the beginning and 157.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 661.15 ms. Allocated memory is still 180.4 MB. Free memory was 157.4 MB in the beginning and 156.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 821867.44 ms. Allocated memory was 180.4 MB in the beginning and 848.3 MB in the end (delta: 667.9 MB). Free memory was 155.7 MB in the beginning and 421.5 MB in the end (delta: -265.8 MB). Peak memory consumption was 402.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4708states) and FLOYD_HOARE automaton (currently 21 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (330 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 821747.8ms, OverallIterations: 278, TraceHistogramMax: 9, EmptinessCheckTime: 763.5ms, AutomataDifference: 362770.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10892 SDtfs, 18722 SDslu, 145604 SDs, 0 SdLazy, 85857 SolverSat, 5115 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 76760.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11899 GetRequests, 4272 SyntacticMatches, 10 SemanticMatches, 7617 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41648 ImplicationChecksByTransitivity, 604318.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4708occurred in iteration=277, InterpolantAutomatonStates: 4447, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7705.5ms AutomataMinimizationTime, 277 MinimizatonAttempts, 47933 StatesRemovedByMinimization, 272 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2460.5ms SsaConstructionTime, 7353.3ms SatisfiabilityAnalysisTime, 377776.8ms InterpolantComputationTime, 14308 NumberOfCodeBlocks, 14307 NumberOfCodeBlocksAsserted, 1238 NumberOfCheckSat, 13756 ConstructedInterpolants, 790 QuantifiedInterpolants, 286317 SizeOfPredicates, 3714 NumberOfNonLiveVariables, 20821 ConjunctsInSsa, 5183 ConjunctsInUnsatCore, 552 InterpolantComputations, 4 PerfectInterpolantSequences, 1946/15772 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown