/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:52:22,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:52:22,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:52:22,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 18:52:22,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 18:52:22,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 18:52:22,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 18:52:22,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 18:52:22,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 18:52:22,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 18:52:22,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 18:52:22,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 18:52:22,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 18:52:22,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 18:52:22,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 18:52:22,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 18:52:22,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 18:52:22,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 18:52:22,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 18:52:22,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 18:52:22,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 18:52:22,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 18:52:22,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 18:52:22,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 18:52:22,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-12 18:52:22,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-12 18:52:22,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-12 18:52:22,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-12 18:52:22,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-12 18:52:22,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-12 18:52:22,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 18:52:22,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 18:52:22,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 18:52:22,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 18:52:22,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 18:52:22,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 18:52:22,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 18:52:22,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 18:52:22,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 18:52:22,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 18:52:22,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 18:52:22,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 18:52:22,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:52:22,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:52:22,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:52:22,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:52:22,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:52:22,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:52:22,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:52:22,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:52:22,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:52:22,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:52:22,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:52:22,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:52:22,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:52:23,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:52:23,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:52:23,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:52:23,194 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:52:23,195 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:52:23,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-08-12 18:52:23,196 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-08-12 18:52:23,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:52:23,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:52:23,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:52:23,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:52:23,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:52:23,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:52:23,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:52:23,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:52:23,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:52:23,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... [2021-08-12 18:52:23,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:52:23,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:52:23,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:52:23,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:52:23,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:52:23,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 18:52:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 18:52:23,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 18:52:23,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 18:52:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 18:52:23,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 18:52:23,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 18:52:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:52:23,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:52:23,335 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 18:52:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 18:52:23,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 18:52:23,336 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:52:23,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:52:23,468 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:52:23,469 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:52:23 BoogieIcfgContainer [2021-08-12 18:52:23,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:52:23,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:52:23,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:52:23,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:52:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:52:23" (1/2) ... [2021-08-12 18:52:23,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf95481 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:52:23, skipping insertion in model container [2021-08-12 18:52:23,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:52:23" (2/2) ... [2021-08-12 18:52:23,481 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-08-12 18:52:23,484 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:52:23,485 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:52:23,485 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:52:23,510 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 18:52:23,525 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 18:52:23,539 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:52:23,539 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:52:23,539 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:52:23,539 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:52:23,539 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:52:23,539 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:52:23,539 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:52:23,539 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:52:23,545 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-08-12 18:52:23,565 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 18:52:23,574 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:23,575 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:23,575 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-08-12 18:52:23,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:23,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949427541] [2021-08-12 18:52:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949427541] [2021-08-12 18:52:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949427541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:23,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 18:52:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284445539] [2021-08-12 18:52:23,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:52:23,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:52:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:52:23,765 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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) [2021-08-12 18:52:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:23,819 INFO L93 Difference]: Finished difference Result 218 states and 619 transitions. [2021-08-12 18:52:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:52:23,820 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 [2021-08-12 18:52:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:23,829 INFO L225 Difference]: With dead ends: 218 [2021-08-12 18:52:23,829 INFO L226 Difference]: Without dead ends: 199 [2021-08-12 18:52:23,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:52:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-12 18:52:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-08-12 18:52:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-08-12 18:52:23,868 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-08-12 18:52:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:23,869 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-08-12 18:52:23,869 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) [2021-08-12 18:52:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-08-12 18:52:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:23,871 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:23,871 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:23,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:52:23,871 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-08-12 18:52:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:23,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038703438] [2021-08-12 18:52:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:23,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:23,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038703438] [2021-08-12 18:52:23,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038703438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:23,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081292267] [2021-08-12 18:52:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 18:52:24,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:24,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081292267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:24,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:24,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-08-12 18:52:24,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268112696] [2021-08-12 18:52:24,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:24,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:24,085 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 18:52:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:24,256 INFO L93 Difference]: Finished difference Result 513 states and 1456 transitions. [2021-08-12 18:52:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:52:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17 [2021-08-12 18:52:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:24,263 INFO L225 Difference]: With dead ends: 513 [2021-08-12 18:52:24,263 INFO L226 Difference]: Without dead ends: 468 [2021-08-12 18:52:24,265 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-12 18:52:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-08-12 18:52:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-08-12 18:52:24,331 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-08-12 18:52:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:24,332 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-08-12 18:52:24,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 18:52:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-08-12 18:52:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:24,333 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:24,333 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:24,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 18:52:24,554 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-08-12 18:52:24,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:24,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763256538] [2021-08-12 18:52:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:24,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:24,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763256538] [2021-08-12 18:52:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763256538] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:24,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:24,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:52:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562620744] [2021-08-12 18:52:24,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 18:52:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 18:52:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 18:52:24,607 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:52:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:24,656 INFO L93 Difference]: Finished difference Result 328 states and 923 transitions. [2021-08-12 18:52:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 18:52:24,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2021-08-12 18:52:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:24,664 INFO L225 Difference]: With dead ends: 328 [2021-08-12 18:52:24,664 INFO L226 Difference]: Without dead ends: 283 [2021-08-12 18:52:24,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-12 18:52:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-08-12 18:52:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-08-12 18:52:24,681 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-08-12 18:52:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:24,682 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-08-12 18:52:24,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-08-12 18:52:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-08-12 18:52:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:24,686 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:24,686 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:24,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 18:52:24,686 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:24,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:24,687 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-08-12 18:52:24,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:24,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662617918] [2021-08-12 18:52:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:24,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:24,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662617918] [2021-08-12 18:52:24,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662617918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:24,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:24,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:24,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337655421] [2021-08-12 18:52:24,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:24,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:24,750 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:24,811 INFO L93 Difference]: Finished difference Result 384 states and 1064 transitions. [2021-08-12 18:52:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 18:52:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:24,814 INFO L225 Difference]: With dead ends: 384 [2021-08-12 18:52:24,814 INFO L226 Difference]: Without dead ends: 339 [2021-08-12 18:52:24,815 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 18:52:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-12 18:52:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-08-12 18:52:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-08-12 18:52:24,825 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-08-12 18:52:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:24,825 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-08-12 18:52:24,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-08-12 18:52:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:24,827 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:24,827 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:24,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 18:52:24,828 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-08-12 18:52:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:24,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194271075] [2021-08-12 18:52:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:24,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194271075] [2021-08-12 18:52:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194271075] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:24,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:24,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:24,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425036952] [2021-08-12 18:52:24,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:24,881 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:25,013 INFO L93 Difference]: Finished difference Result 312 states and 850 transitions. [2021-08-12 18:52:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:52:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:25,015 INFO L225 Difference]: With dead ends: 312 [2021-08-12 18:52:25,015 INFO L226 Difference]: Without dead ends: 242 [2021-08-12 18:52:25,015 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-12 18:52:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-08-12 18:52:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-08-12 18:52:25,023 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-08-12 18:52:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:25,023 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-08-12 18:52:25,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-08-12 18:52:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:25,024 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:25,024 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:25,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 18:52:25,025 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-08-12 18:52:25,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:25,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609891388] [2021-08-12 18:52:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609891388] [2021-08-12 18:52:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609891388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984784768] [2021-08-12 18:52:25,061 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:25,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984784768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:25,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:25,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-12 18:52:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419290935] [2021-08-12 18:52:25,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:25,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:25,164 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 18:52:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:25,458 INFO L93 Difference]: Finished difference Result 474 states and 1280 transitions. [2021-08-12 18:52:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:52:25,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17 [2021-08-12 18:52:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:25,463 INFO L225 Difference]: With dead ends: 474 [2021-08-12 18:52:25,463 INFO L226 Difference]: Without dead ends: 429 [2021-08-12 18:52:25,465 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:52:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-12 18:52:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-08-12 18:52:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-08-12 18:52:25,474 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-08-12 18:52:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:25,474 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-08-12 18:52:25,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-12 18:52:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-08-12 18:52:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:25,475 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:25,475 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:25,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:25,692 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-08-12 18:52:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34235829] [2021-08-12 18:52:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:25,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:25,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34235829] [2021-08-12 18:52:25,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34235829] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:25,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:25,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885446500] [2021-08-12 18:52:25,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:25,718 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:25,796 INFO L93 Difference]: Finished difference Result 347 states and 944 transitions. [2021-08-12 18:52:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:52:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:25,798 INFO L225 Difference]: With dead ends: 347 [2021-08-12 18:52:25,798 INFO L226 Difference]: Without dead ends: 296 [2021-08-12 18:52:25,798 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-12 18:52:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-08-12 18:52:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-08-12 18:52:25,807 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-08-12 18:52:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:25,807 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-08-12 18:52:25,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-08-12 18:52:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:25,808 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:25,808 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:25,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 18:52:25,808 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-08-12 18:52:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:25,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666470861] [2021-08-12 18:52:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666470861] [2021-08-12 18:52:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666470861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:25,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:25,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:25,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615295695] [2021-08-12 18:52:25,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:25,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:25,863 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:25,983 INFO L93 Difference]: Finished difference Result 336 states and 903 transitions. [2021-08-12 18:52:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:25,985 INFO L225 Difference]: With dead ends: 336 [2021-08-12 18:52:25,985 INFO L226 Difference]: Without dead ends: 294 [2021-08-12 18:52:25,986 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-12 18:52:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-08-12 18:52:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-08-12 18:52:25,996 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-08-12 18:52:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-08-12 18:52:25,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-08-12 18:52:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:25,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:25,997 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:25,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-12 18:52:25,998 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-08-12 18:52:25,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:25,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004340361] [2021-08-12 18:52:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004340361] [2021-08-12 18:52:26,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004340361] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:26,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:26,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:26,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321015827] [2021-08-12 18:52:26,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:26,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:26,040 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:26,146 INFO L93 Difference]: Finished difference Result 316 states and 860 transitions. [2021-08-12 18:52:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 18:52:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:26,149 INFO L225 Difference]: With dead ends: 316 [2021-08-12 18:52:26,149 INFO L226 Difference]: Without dead ends: 285 [2021-08-12 18:52:26,150 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-12 18:52:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-08-12 18:52:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-08-12 18:52:26,158 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-08-12 18:52:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:26,158 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-08-12 18:52:26,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-08-12 18:52:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:26,159 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:26,159 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:26,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-12 18:52:26,159 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-08-12 18:52:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:26,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719252057] [2021-08-12 18:52:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:26,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719252057] [2021-08-12 18:52:26,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719252057] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:52:26,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:52:26,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 18:52:26,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139696634] [2021-08-12 18:52:26,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 18:52:26,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 18:52:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 18:52:26,182 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:26,265 INFO L93 Difference]: Finished difference Result 288 states and 802 transitions. [2021-08-12 18:52:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:52:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-08-12 18:52:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:26,267 INFO L225 Difference]: With dead ends: 288 [2021-08-12 18:52:26,267 INFO L226 Difference]: Without dead ends: 243 [2021-08-12 18:52:26,267 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 18:52:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-12 18:52:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-08-12 18:52:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-08-12 18:52:26,275 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-08-12 18:52:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:26,276 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-08-12 18:52:26,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-08-12 18:52:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-08-12 18:52:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:26,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:26,276 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:26,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-12 18:52:26,277 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:26,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-08-12 18:52:26,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:26,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059542069] [2021-08-12 18:52:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059542069] [2021-08-12 18:52:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059542069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139121726] [2021-08-12 18:52:26,308 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:26,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139121726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:26,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:26,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988362606] [2021-08-12 18:52:26,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:26,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:26,397 INFO L87 Difference]: Start difference. First operand 193 states and 556 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) [2021-08-12 18:52:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:26,601 INFO L93 Difference]: Finished difference Result 402 states and 1115 transitions. [2021-08-12 18:52:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:52:26,602 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 17 [2021-08-12 18:52:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:26,604 INFO L225 Difference]: With dead ends: 402 [2021-08-12 18:52:26,604 INFO L226 Difference]: Without dead ends: 357 [2021-08-12 18:52:26,604 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:52:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-12 18:52:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-08-12 18:52:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-08-12 18:52:26,614 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-08-12 18:52:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:26,614 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-08-12 18:52:26,615 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) [2021-08-12 18:52:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-08-12 18:52:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 18:52:26,615 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:26,615 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 18:52:26,832 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-08-12 18:52:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592899689] [2021-08-12 18:52:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:26,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592899689] [2021-08-12 18:52:26,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592899689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226782332] [2021-08-12 18:52:26,870 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:26,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:52:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226782332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:26,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:26,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345565630] [2021-08-12 18:52:26,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:26,960 INFO L87 Difference]: Start difference. First operand 189 states and 542 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) [2021-08-12 18:52:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:27,151 INFO L93 Difference]: Finished difference Result 356 states and 1014 transitions. [2021-08-12 18:52:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:52:27,151 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 17 [2021-08-12 18:52:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:27,153 INFO L225 Difference]: With dead ends: 356 [2021-08-12 18:52:27,153 INFO L226 Difference]: Without dead ends: 311 [2021-08-12 18:52:27,153 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:52:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-12 18:52:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-08-12 18:52:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-08-12 18:52:27,162 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-08-12 18:52:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:27,162 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-08-12 18:52:27,162 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) [2021-08-12 18:52:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-08-12 18:52:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 18:52:27,163 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:27,163 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:27,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:27,381 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-08-12 18:52:27,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:27,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294389917] [2021-08-12 18:52:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:27,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294389917] [2021-08-12 18:52:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294389917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078680240] [2021-08-12 18:52:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078680240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:27,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827367433] [2021-08-12 18:52:27,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:27,511 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:27,642 INFO L93 Difference]: Finished difference Result 556 states and 1613 transitions. [2021-08-12 18:52:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 18:52:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 18:52:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:27,645 INFO L225 Difference]: With dead ends: 556 [2021-08-12 18:52:27,645 INFO L226 Difference]: Without dead ends: 524 [2021-08-12 18:52:27,646 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-12 18:52:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-08-12 18:52:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-08-12 18:52:27,662 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-08-12 18:52:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:27,662 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-08-12 18:52:27,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-08-12 18:52:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 18:52:27,663 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:27,663 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:27,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 18:52:27,880 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-08-12 18:52:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:27,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044464617] [2021-08-12 18:52:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:27,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044464617] [2021-08-12 18:52:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044464617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514372754] [2021-08-12 18:52:27,922 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:28,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:28,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:28,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:52:28,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:28,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514372754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:28,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:28,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:28,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586081441] [2021-08-12 18:52:28,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:28,054 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:28,204 INFO L93 Difference]: Finished difference Result 709 states and 2112 transitions. [2021-08-12 18:52:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:52:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 18:52:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:28,208 INFO L225 Difference]: With dead ends: 709 [2021-08-12 18:52:28,208 INFO L226 Difference]: Without dead ends: 662 [2021-08-12 18:52:28,208 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:52:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-12 18:52:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-08-12 18:52:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-08-12 18:52:28,231 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-08-12 18:52:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:28,231 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-08-12 18:52:28,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-08-12 18:52:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:28,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:28,232 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:28,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:28,452 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:28,453 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-08-12 18:52:28,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:28,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105240422] [2021-08-12 18:52:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:28,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105240422] [2021-08-12 18:52:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105240422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130705368] [2021-08-12 18:52:28,488 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:28,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:52:28,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:28,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130705368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:28,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:28,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:52:28,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408255275] [2021-08-12 18:52:28,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:28,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:28,597 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-08-12 18:52:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:28,942 INFO L93 Difference]: Finished difference Result 1046 states and 3206 transitions. [2021-08-12 18:52:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:52:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-08-12 18:52:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:28,947 INFO L225 Difference]: With dead ends: 1046 [2021-08-12 18:52:28,947 INFO L226 Difference]: Without dead ends: 1001 [2021-08-12 18:52:28,948 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-08-12 18:52:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-08-12 18:52:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-08-12 18:52:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-08-12 18:52:28,980 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-08-12 18:52:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:28,980 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-08-12 18:52:28,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-08-12 18:52:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-08-12 18:52:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:28,982 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:28,982 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:29,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 18:52:29,199 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-08-12 18:52:29,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:29,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243645487] [2021-08-12 18:52:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:29,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:29,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243645487] [2021-08-12 18:52:29,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243645487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:29,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903436488] [2021-08-12 18:52:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:52:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:29,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903436488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:29,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:29,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:52:29,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565076407] [2021-08-12 18:52:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:29,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:29,342 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:52:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:30,060 INFO L93 Difference]: Finished difference Result 1225 states and 3882 transitions. [2021-08-12 18:52:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 18:52:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:52:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:30,076 INFO L225 Difference]: With dead ends: 1225 [2021-08-12 18:52:30,076 INFO L226 Difference]: Without dead ends: 1180 [2021-08-12 18:52:30,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:52:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-12 18:52:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-08-12 18:52:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-08-12 18:52:30,121 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-08-12 18:52:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:30,122 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-08-12 18:52:30,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:52:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-08-12 18:52:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:30,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:30,123 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:30,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 18:52:30,339 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-08-12 18:52:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:30,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675462346] [2021-08-12 18:52:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:30,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675462346] [2021-08-12 18:52:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675462346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158757665] [2021-08-12 18:52:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:30,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:30,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158757665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:30,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:30,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42402423] [2021-08-12 18:52:30,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:30,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:30,557 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:31,071 INFO L93 Difference]: Finished difference Result 1033 states and 3175 transitions. [2021-08-12 18:52:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:52:31,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:31,076 INFO L225 Difference]: With dead ends: 1033 [2021-08-12 18:52:31,076 INFO L226 Difference]: Without dead ends: 977 [2021-08-12 18:52:31,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:52:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-08-12 18:52:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-08-12 18:52:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-08-12 18:52:31,127 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-08-12 18:52:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:31,127 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-08-12 18:52:31,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-08-12 18:52:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:31,129 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:31,129 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:31,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 18:52:31,347 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-08-12 18:52:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:31,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966513022] [2021-08-12 18:52:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:31,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:31,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966513022] [2021-08-12 18:52:31,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966513022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:31,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209309802] [2021-08-12 18:52:31,377 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 [2021-08-12 18:52:31,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:52:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:31,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209309802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821492399] [2021-08-12 18:52:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:31,514 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:32,571 INFO L93 Difference]: Finished difference Result 1978 states and 5839 transitions. [2021-08-12 18:52:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 18:52:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:52:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:32,589 INFO L225 Difference]: With dead ends: 1978 [2021-08-12 18:52:32,589 INFO L226 Difference]: Without dead ends: 1926 [2021-08-12 18:52:32,590 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 18:52:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-12 18:52:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-08-12 18:52:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-08-12 18:52:32,739 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-08-12 18:52:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:32,739 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-08-12 18:52:32,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-08-12 18:52:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:32,758 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:32,758 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:32,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 18:52:32,959 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-08-12 18:52:32,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:32,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672134260] [2021-08-12 18:52:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:33,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:33,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672134260] [2021-08-12 18:52:33,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672134260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:33,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702240295] [2021-08-12 18:52:33,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:33,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:52:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:33,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702240295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:33,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:33,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:52:33,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771549897] [2021-08-12 18:52:33,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:33,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:33,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:33,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:33,144 INFO L87 Difference]: Start difference. First operand 812 states and 2715 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) [2021-08-12 18:52:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:34,034 INFO L93 Difference]: Finished difference Result 2571 states and 8081 transitions. [2021-08-12 18:52:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:52:34,034 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 21 [2021-08-12 18:52:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:34,046 INFO L225 Difference]: With dead ends: 2571 [2021-08-12 18:52:34,046 INFO L226 Difference]: Without dead ends: 2518 [2021-08-12 18:52:34,046 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:52:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-08-12 18:52:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-08-12 18:52:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-08-12 18:52:34,126 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-08-12 18:52:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:34,127 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-08-12 18:52:34,127 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) [2021-08-12 18:52:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-08-12 18:52:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:34,129 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:34,129 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:34,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:34,345 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-08-12 18:52:34,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:34,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391015373] [2021-08-12 18:52:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:34,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:34,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391015373] [2021-08-12 18:52:34,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391015373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:34,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757090911] [2021-08-12 18:52:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:34,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:52:34,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:52:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:34,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757090911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:34,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:34,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:52:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210086415] [2021-08-12 18:52:34,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:52:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:52:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:52:34,470 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:52:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:35,336 INFO L93 Difference]: Finished difference Result 2716 states and 8695 transitions. [2021-08-12 18:52:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:52:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:52:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:35,348 INFO L225 Difference]: With dead ends: 2716 [2021-08-12 18:52:35,349 INFO L226 Difference]: Without dead ends: 2671 [2021-08-12 18:52:35,349 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:52:35,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-08-12 18:52:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-08-12 18:52:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-08-12 18:52:35,454 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-08-12 18:52:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:35,454 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-08-12 18:52:35,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:52:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-08-12 18:52:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:35,457 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:35,457 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:35,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:35,675 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-08-12 18:52:35,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:35,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795882971] [2021-08-12 18:52:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:35,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795882971] [2021-08-12 18:52:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795882971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:35,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543404768] [2021-08-12 18:52:35,716 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:35,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:52:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543404768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:35,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:35,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890234455] [2021-08-12 18:52:35,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:35,844 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:36,746 INFO L93 Difference]: Finished difference Result 2038 states and 6170 transitions. [2021-08-12 18:52:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:52:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:36,753 INFO L225 Difference]: With dead ends: 2038 [2021-08-12 18:52:36,753 INFO L226 Difference]: Without dead ends: 1972 [2021-08-12 18:52:36,753 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 346.0ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:52:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-08-12 18:52:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-08-12 18:52:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-08-12 18:52:36,830 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-08-12 18:52:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:36,831 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-08-12 18:52:36,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-08-12 18:52:36,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:36,835 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:36,835 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:37,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 18:52:37,052 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-08-12 18:52:37,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:37,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697734295] [2021-08-12 18:52:37,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:37,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:37,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697734295] [2021-08-12 18:52:37,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697734295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:37,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237870913] [2021-08-12 18:52:37,079 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237870913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016023441] [2021-08-12 18:52:37,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:37,188 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:37,854 INFO L93 Difference]: Finished difference Result 1412 states and 4503 transitions. [2021-08-12 18:52:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:52:37,854 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:37,858 INFO L225 Difference]: With dead ends: 1412 [2021-08-12 18:52:37,859 INFO L226 Difference]: Without dead ends: 1356 [2021-08-12 18:52:37,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-08-12 18:52:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-08-12 18:52:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-08-12 18:52:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-08-12 18:52:37,937 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-08-12 18:52:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:37,937 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-08-12 18:52:37,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-08-12 18:52:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:37,940 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:37,940 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:38,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:38,153 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-08-12 18:52:38,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:38,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082569297] [2021-08-12 18:52:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:38,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:38,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082569297] [2021-08-12 18:52:38,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082569297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:38,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117601035] [2021-08-12 18:52:38,189 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:38,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:38,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117601035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:38,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:38,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547813706] [2021-08-12 18:52:38,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:38,308 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:39,274 INFO L93 Difference]: Finished difference Result 1800 states and 5521 transitions. [2021-08-12 18:52:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 18:52:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:39,279 INFO L225 Difference]: With dead ends: 1800 [2021-08-12 18:52:39,279 INFO L226 Difference]: Without dead ends: 1734 [2021-08-12 18:52:39,280 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:52:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-08-12 18:52:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-08-12 18:52:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-08-12 18:52:39,365 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-08-12 18:52:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:39,365 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-08-12 18:52:39,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-08-12 18:52:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:39,367 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:39,367 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 18:52:39,581 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-08-12 18:52:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:39,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973743923] [2021-08-12 18:52:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:39,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973743923] [2021-08-12 18:52:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973743923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:39,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281163575] [2021-08-12 18:52:39,611 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:39,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:52:39,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:39,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:39,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281163575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:39,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:39,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:39,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805717796] [2021-08-12 18:52:39,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:39,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:39,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:39,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:39,757 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 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) [2021-08-12 18:52:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:40,793 INFO L93 Difference]: Finished difference Result 1858 states and 5721 transitions. [2021-08-12 18:52:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 18:52:40,793 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 [2021-08-12 18:52:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:40,798 INFO L225 Difference]: With dead ends: 1858 [2021-08-12 18:52:40,798 INFO L226 Difference]: Without dead ends: 1827 [2021-08-12 18:52:40,799 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 18:52:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-12 18:52:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-08-12 18:52:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-08-12 18:52:40,906 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-08-12 18:52:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:40,906 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-08-12 18:52:40,906 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) [2021-08-12 18:52:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-08-12 18:52:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:40,908 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:40,908 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:41,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:41,126 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-08-12 18:52:41,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:41,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076373337] [2021-08-12 18:52:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:41,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:41,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076373337] [2021-08-12 18:52:41,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076373337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:41,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946361635] [2021-08-12 18:52:41,161 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:41,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946361635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:41,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:41,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-12 18:52:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935020705] [2021-08-12 18:52:41,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:41,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:41,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:41,227 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:41,788 INFO L93 Difference]: Finished difference Result 1846 states and 5832 transitions. [2021-08-12 18:52:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:52:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:52:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:41,794 INFO L225 Difference]: With dead ends: 1846 [2021-08-12 18:52:41,794 INFO L226 Difference]: Without dead ends: 1777 [2021-08-12 18:52:41,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:52:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-08-12 18:52:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-08-12 18:52:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-08-12 18:52:41,901 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-08-12 18:52:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:41,902 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-08-12 18:52:41,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-08-12 18:52:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:41,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:41,904 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:42,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 18:52:42,121 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-08-12 18:52:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:42,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146469078] [2021-08-12 18:52:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:42,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146469078] [2021-08-12 18:52:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146469078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624575210] [2021-08-12 18:52:42,153 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 [2021-08-12 18:52:42,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:42,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:42,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624575210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:42,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:42,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303218907] [2021-08-12 18:52:42,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:42,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:42,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:42,342 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:43,729 INFO L93 Difference]: Finished difference Result 2622 states and 8010 transitions. [2021-08-12 18:52:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 18:52:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:52:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:43,736 INFO L225 Difference]: With dead ends: 2622 [2021-08-12 18:52:43,736 INFO L226 Difference]: Without dead ends: 2577 [2021-08-12 18:52:43,737 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 536.6ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 18:52:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-08-12 18:52:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-08-12 18:52:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-08-12 18:52:43,842 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-08-12 18:52:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:43,842 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-08-12 18:52:43,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-08-12 18:52:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:43,844 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:43,844 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 18:52:44,061 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-08-12 18:52:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:44,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923397772] [2021-08-12 18:52:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:44,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:44,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923397772] [2021-08-12 18:52:44,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923397772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:44,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942791423] [2021-08-12 18:52:44,095 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) [2021-08-12 18:52:44,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:52:44,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:44,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942791423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:44,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:44,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607408331] [2021-08-12 18:52:44,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:44,203 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:45,247 INFO L93 Difference]: Finished difference Result 2315 states and 7078 transitions. [2021-08-12 18:52:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 18:52:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:45,252 INFO L225 Difference]: With dead ends: 2315 [2021-08-12 18:52:45,253 INFO L226 Difference]: Without dead ends: 2249 [2021-08-12 18:52:45,253 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:52:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-08-12 18:52:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-08-12 18:52:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-08-12 18:52:45,362 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-08-12 18:52:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:45,362 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-08-12 18:52:45,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-08-12 18:52:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:45,364 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:45,364 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:45,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 18:52:45,582 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-08-12 18:52:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:45,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352355176] [2021-08-12 18:52:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:45,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352355176] [2021-08-12 18:52:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352355176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:45,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801884484] [2021-08-12 18:52:45,618 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 [2021-08-12 18:52:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:45,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801884484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:45,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:45,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224664084] [2021-08-12 18:52:45,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:45,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:45,829 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:47,533 INFO L93 Difference]: Finished difference Result 2851 states and 8696 transitions. [2021-08-12 18:52:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 18:52:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:52:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:47,539 INFO L225 Difference]: With dead ends: 2851 [2021-08-12 18:52:47,539 INFO L226 Difference]: Without dead ends: 2820 [2021-08-12 18:52:47,540 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 18:52:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-08-12 18:52:47,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-08-12 18:52:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-08-12 18:52:47,644 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-08-12 18:52:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:47,645 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-08-12 18:52:47,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-08-12 18:52:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:47,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:47,647 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:47,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 18:52:47,863 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-08-12 18:52:47,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:47,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979059053] [2021-08-12 18:52:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:47,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:47,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979059053] [2021-08-12 18:52:47,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979059053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:47,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330818703] [2021-08-12 18:52:47,888 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 [2021-08-12 18:52:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330818703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:47,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:47,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673957045] [2021-08-12 18:52:47,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:47,993 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:49,348 INFO L93 Difference]: Finished difference Result 2591 states and 8013 transitions. [2021-08-12 18:52:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 18:52:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:52:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:49,354 INFO L225 Difference]: With dead ends: 2591 [2021-08-12 18:52:49,354 INFO L226 Difference]: Without dead ends: 2539 [2021-08-12 18:52:49,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 18:52:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-12 18:52:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-08-12 18:52:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-08-12 18:52:49,460 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-08-12 18:52:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:49,460 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-08-12 18:52:49,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-08-12 18:52:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:49,462 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:49,462 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:49,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 18:52:49,678 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-08-12 18:52:49,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:49,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346854205] [2021-08-12 18:52:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:49,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346854205] [2021-08-12 18:52:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346854205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416976372] [2021-08-12 18:52:49,704 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 [2021-08-12 18:52:49,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:52:49,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:49,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:49,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416976372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:49,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:49,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940216626] [2021-08-12 18:52:49,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:49,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:49,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:49,807 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:51,013 INFO L93 Difference]: Finished difference Result 2242 states and 6894 transitions. [2021-08-12 18:52:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 18:52:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:52:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:51,018 INFO L225 Difference]: With dead ends: 2242 [2021-08-12 18:52:51,018 INFO L226 Difference]: Without dead ends: 2176 [2021-08-12 18:52:51,019 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:52:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-08-12 18:52:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-08-12 18:52:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-08-12 18:52:51,127 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-08-12 18:52:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:51,128 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-08-12 18:52:51,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:52:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-08-12 18:52:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:51,130 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:51,130 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:51,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:51,347 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-08-12 18:52:51,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:51,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683494519] [2021-08-12 18:52:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683494519] [2021-08-12 18:52:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683494519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564278181] [2021-08-12 18:52:51,374 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:51,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:52:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564278181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:51,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:51,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:51,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619306901] [2021-08-12 18:52:51,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:51,494 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 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) [2021-08-12 18:52:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:52,860 INFO L93 Difference]: Finished difference Result 2309 states and 7156 transitions. [2021-08-12 18:52:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 18:52:52,860 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 [2021-08-12 18:52:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:52,865 INFO L225 Difference]: With dead ends: 2309 [2021-08-12 18:52:52,865 INFO L226 Difference]: Without dead ends: 2278 [2021-08-12 18:52:52,865 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 18:52:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-08-12 18:52:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-08-12 18:52:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-08-12 18:52:52,973 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-08-12 18:52:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:52,973 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-08-12 18:52:52,973 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) [2021-08-12 18:52:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-08-12 18:52:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:52,975 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:52,975 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:53,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 18:52:53,176 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:53,177 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-08-12 18:52:53,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:53,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881335849] [2021-08-12 18:52:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:53,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881335849] [2021-08-12 18:52:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881335849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096745327] [2021-08-12 18:52:53,237 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:53,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:52:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:53,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:53,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096745327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:53,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:53,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:52:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988833677] [2021-08-12 18:52:53,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:53,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:53,388 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-08-12 18:52:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:54,170 INFO L93 Difference]: Finished difference Result 2668 states and 8646 transitions. [2021-08-12 18:52:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:52:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 [2021-08-12 18:52:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:54,176 INFO L225 Difference]: With dead ends: 2668 [2021-08-12 18:52:54,176 INFO L226 Difference]: Without dead ends: 2607 [2021-08-12 18:52:54,176 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:52:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-08-12 18:52:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-08-12 18:52:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 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) [2021-08-12 18:52:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-08-12 18:52:54,340 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-08-12 18:52:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:54,340 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-08-12 18:52:54,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-08-12 18:52:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-08-12 18:52:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:54,342 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:54,342 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:54,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:54,558 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-08-12 18:52:54,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:54,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561272345] [2021-08-12 18:52:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:54,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561272345] [2021-08-12 18:52:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561272345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085316838] [2021-08-12 18:52:54,592 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:54,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:52:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:54,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:52:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085316838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:54,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:54,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-12 18:52:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404105818] [2021-08-12 18:52:54,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:54,672 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:55,413 INFO L93 Difference]: Finished difference Result 2453 states and 7985 transitions. [2021-08-12 18:52:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:52:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 18:52:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:55,419 INFO L225 Difference]: With dead ends: 2453 [2021-08-12 18:52:55,419 INFO L226 Difference]: Without dead ends: 2384 [2021-08-12 18:52:55,419 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:52:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-12 18:52:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-08-12 18:52:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-08-12 18:52:55,558 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-08-12 18:52:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-08-12 18:52:55,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-08-12 18:52:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:55,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:55,561 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:55,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 18:52:55,777 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-08-12 18:52:55,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:55,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402433683] [2021-08-12 18:52:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:55,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402433683] [2021-08-12 18:52:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402433683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092548496] [2021-08-12 18:52:55,804 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:55,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092548496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:55,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:55,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-12 18:52:55,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254103439] [2021-08-12 18:52:55,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:52:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:52:55,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:52:55,872 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-08-12 18:52:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:56,649 INFO L93 Difference]: Finished difference Result 2431 states and 7907 transitions. [2021-08-12 18:52:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:52:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-08-12 18:52:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:56,654 INFO L225 Difference]: With dead ends: 2431 [2021-08-12 18:52:56,654 INFO L226 Difference]: Without dead ends: 2348 [2021-08-12 18:52:56,655 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:52:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-08-12 18:52:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-08-12 18:52:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-08-12 18:52:56,821 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-08-12 18:52:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:56,821 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-08-12 18:52:56,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-08-12 18:52:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-08-12 18:52:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:56,823 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:56,824 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:57,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 18:52:57,040 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:57,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-08-12 18:52:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:57,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31644166] [2021-08-12 18:52:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:57,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31644166] [2021-08-12 18:52:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31644166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181327410] [2021-08-12 18:52:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:52:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181327410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912392849] [2021-08-12 18:52:57,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:57,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:57,173 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:57,995 INFO L93 Difference]: Finished difference Result 1915 states and 6428 transitions. [2021-08-12 18:52:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:52:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:52:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:57,999 INFO L225 Difference]: With dead ends: 1915 [2021-08-12 18:52:57,999 INFO L226 Difference]: Without dead ends: 1877 [2021-08-12 18:52:58,000 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:52:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-08-12 18:52:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-08-12 18:52:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-08-12 18:52:58,145 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-08-12 18:52:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:58,146 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-08-12 18:52:58,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:52:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-08-12 18:52:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:58,148 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:58,148 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:58,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 18:52:58,364 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-08-12 18:52:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515834604] [2021-08-12 18:52:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:58,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515834604] [2021-08-12 18:52:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515834604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061468960] [2021-08-12 18:52:58,386 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 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 [2021-08-12 18:52:58,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:52:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:52:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061468960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:58,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 18:52:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522718761] [2021-08-12 18:52:58,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 18:52:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 18:52:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-12 18:52:58,456 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-12 18:52:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:52:59,279 INFO L93 Difference]: Finished difference Result 2724 states and 9058 transitions. [2021-08-12 18:52:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 18:52:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21 [2021-08-12 18:52:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:52:59,285 INFO L225 Difference]: With dead ends: 2724 [2021-08-12 18:52:59,285 INFO L226 Difference]: Without dead ends: 2637 [2021-08-12 18:52:59,285 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:52:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-08-12 18:52:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-08-12 18:52:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:52:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-08-12 18:52:59,461 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-08-12 18:52:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:52:59,461 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-08-12 18:52:59,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-08-12 18:52:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-08-12 18:52:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:52:59,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:52:59,464 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:52:59,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 18:52:59,680 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:52:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:52:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-08-12 18:52:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:52:59,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286741736] [2021-08-12 18:52:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:52:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:52:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:59,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:52:59,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286741736] [2021-08-12 18:52:59,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286741736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:59,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291289798] [2021-08-12 18:52:59,709 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 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 [2021-08-12 18:52:59,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:52:59,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:52:59,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:52:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:52:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:52:59,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291289798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:52:59,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:52:59,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:52:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560482355] [2021-08-12 18:52:59,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:52:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:52:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:52:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:52:59,814 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:00,930 INFO L93 Difference]: Finished difference Result 2411 states and 7874 transitions. [2021-08-12 18:53:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:53:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:53:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:00,935 INFO L225 Difference]: With dead ends: 2411 [2021-08-12 18:53:00,935 INFO L226 Difference]: Without dead ends: 2365 [2021-08-12 18:53:00,936 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:53:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-08-12 18:53:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-08-12 18:53:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-08-12 18:53:01,108 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-08-12 18:53:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:01,108 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-08-12 18:53:01,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-08-12 18:53:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:01,111 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:01,111 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:01,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 18:53:01,327 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-08-12 18:53:01,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:01,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531782621] [2021-08-12 18:53:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531782621] [2021-08-12 18:53:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531782621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655974935] [2021-08-12 18:53:01,346 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 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 [2021-08-12 18:53:01,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:53:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655974935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:01,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 18:53:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936083982] [2021-08-12 18:53:01,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 18:53:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 18:53:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-12 18:53:01,417 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-12 18:53:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:02,497 INFO L93 Difference]: Finished difference Result 3307 states and 10858 transitions. [2021-08-12 18:53:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:53:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-08-12 18:53:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:02,504 INFO L225 Difference]: With dead ends: 3307 [2021-08-12 18:53:02,504 INFO L226 Difference]: Without dead ends: 3232 [2021-08-12 18:53:02,505 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-12 18:53:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-08-12 18:53:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-08-12 18:53:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-08-12 18:53:02,693 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-08-12 18:53:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:02,694 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-08-12 18:53:02,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-12 18:53:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-08-12 18:53:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:02,696 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:02,696 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:02,912 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-08-12 18:53:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533722019] [2021-08-12 18:53:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:02,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533722019] [2021-08-12 18:53:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533722019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:02,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116086596] [2021-08-12 18:53:02,939 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 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 [2021-08-12 18:53:03,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:03,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116086596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:03,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:03,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40185387] [2021-08-12 18:53:03,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:03,129 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:04,169 INFO L93 Difference]: Finished difference Result 2267 states and 7513 transitions. [2021-08-12 18:53:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:53:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:04,175 INFO L225 Difference]: With dead ends: 2267 [2021-08-12 18:53:04,175 INFO L226 Difference]: Without dead ends: 2222 [2021-08-12 18:53:04,175 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:53:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-08-12 18:53:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-08-12 18:53:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-08-12 18:53:04,354 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-08-12 18:53:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:04,354 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-08-12 18:53:04,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-08-12 18:53:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:04,357 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:04,357 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:04,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 18:53:04,562 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:04,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-08-12 18:53:04,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:04,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574827910] [2021-08-12 18:53:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:04,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574827910] [2021-08-12 18:53:04,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574827910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292879586] [2021-08-12 18:53:04,612 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 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 [2021-08-12 18:53:04,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:53:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:04,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 18:53:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:04,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292879586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:04,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:04,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:53:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493286558] [2021-08-12 18:53:04,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:53:04,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:53:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:53:04,688 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-08-12 18:53:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:05,778 INFO L93 Difference]: Finished difference Result 3243 states and 10866 transitions. [2021-08-12 18:53:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 18:53:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-08-12 18:53:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:05,786 INFO L225 Difference]: With dead ends: 3243 [2021-08-12 18:53:05,786 INFO L226 Difference]: Without dead ends: 3168 [2021-08-12 18:53:05,786 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:53:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-08-12 18:53:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-08-12 18:53:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-08-12 18:53:05,994 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-08-12 18:53:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:05,994 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-08-12 18:53:05,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-08-12 18:53:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-08-12 18:53:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:05,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:05,997 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:06,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 18:53:06,213 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-08-12 18:53:06,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:06,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907001252] [2021-08-12 18:53:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:06,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:06,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907001252] [2021-08-12 18:53:06,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907001252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:06,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256468307] [2021-08-12 18:53:06,240 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 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 [2021-08-12 18:53:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:06,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256468307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:06,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:06,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551237898] [2021-08-12 18:53:06,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:06,347 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:07,324 INFO L93 Difference]: Finished difference Result 2456 states and 8290 transitions. [2021-08-12 18:53:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:53:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:07,330 INFO L225 Difference]: With dead ends: 2456 [2021-08-12 18:53:07,330 INFO L226 Difference]: Without dead ends: 2400 [2021-08-12 18:53:07,330 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:53:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-12 18:53:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-08-12 18:53:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-08-12 18:53:07,536 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-08-12 18:53:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:07,536 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-08-12 18:53:07,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-08-12 18:53:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:07,540 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:07,540 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:07,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:07,756 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-08-12 18:53:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:07,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149596015] [2021-08-12 18:53:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149596015] [2021-08-12 18:53:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149596015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479730257] [2021-08-12 18:53:07,795 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 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 [2021-08-12 18:53:07,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:07,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479730257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:07,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:07,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506304477] [2021-08-12 18:53:07,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:07,880 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:09,051 INFO L93 Difference]: Finished difference Result 2962 states and 10071 transitions. [2021-08-12 18:53:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:53:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:53:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:09,058 INFO L225 Difference]: With dead ends: 2962 [2021-08-12 18:53:09,058 INFO L226 Difference]: Without dead ends: 2917 [2021-08-12 18:53:09,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:53:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-08-12 18:53:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-08-12 18:53:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-08-12 18:53:09,280 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-08-12 18:53:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:09,280 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-08-12 18:53:09,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-08-12 18:53:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:09,283 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:09,283 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:09,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 18:53:09,497 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-08-12 18:53:09,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:09,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149133920] [2021-08-12 18:53:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:09,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149133920] [2021-08-12 18:53:09,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149133920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:09,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520005023] [2021-08-12 18:53:09,536 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 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 [2021-08-12 18:53:09,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:53:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520005023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:09,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:09,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435424931] [2021-08-12 18:53:09,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:09,627 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:11,123 INFO L93 Difference]: Finished difference Result 3397 states and 11421 transitions. [2021-08-12 18:53:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:53:11,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:53:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:11,131 INFO L225 Difference]: With dead ends: 3397 [2021-08-12 18:53:11,131 INFO L226 Difference]: Without dead ends: 3352 [2021-08-12 18:53:11,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:53:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-08-12 18:53:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-08-12 18:53:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-08-12 18:53:11,363 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-08-12 18:53:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:11,363 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-08-12 18:53:11,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-08-12 18:53:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:11,366 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:11,366 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:11,581 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-08-12 18:53:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069550371] [2021-08-12 18:53:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:11,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069550371] [2021-08-12 18:53:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069550371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691740756] [2021-08-12 18:53:11,614 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 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 [2021-08-12 18:53:11,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:11,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691740756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:11,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:11,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:11,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560068083] [2021-08-12 18:53:11,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:11,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:11,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:11,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:11,714 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:12,622 INFO L93 Difference]: Finished difference Result 2345 states and 8022 transitions. [2021-08-12 18:53:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 18:53:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:53:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:12,628 INFO L225 Difference]: With dead ends: 2345 [2021-08-12 18:53:12,628 INFO L226 Difference]: Without dead ends: 2310 [2021-08-12 18:53:12,629 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:53:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-08-12 18:53:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-08-12 18:53:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-08-12 18:53:12,869 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-08-12 18:53:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:12,869 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-08-12 18:53:12,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-08-12 18:53:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:12,873 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:12,873 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:13,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 18:53:13,077 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-08-12 18:53:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:13,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513800955] [2021-08-12 18:53:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:13,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513800955] [2021-08-12 18:53:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513800955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122520654] [2021-08-12 18:53:13,121 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 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 [2021-08-12 18:53:13,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:53:13,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122520654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:13,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:13,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784627224] [2021-08-12 18:53:13,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:13,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:13,224 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:14,273 INFO L93 Difference]: Finished difference Result 2536 states and 8458 transitions. [2021-08-12 18:53:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:53:14,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:53:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:14,279 INFO L225 Difference]: With dead ends: 2536 [2021-08-12 18:53:14,279 INFO L226 Difference]: Without dead ends: 2501 [2021-08-12 18:53:14,279 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:53:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-08-12 18:53:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-08-12 18:53:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-08-12 18:53:14,527 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-08-12 18:53:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:14,527 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-08-12 18:53:14,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-08-12 18:53:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:14,530 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:14,530 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:14,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 18:53:14,749 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-08-12 18:53:14,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:14,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003213643] [2021-08-12 18:53:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:14,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:14,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003213643] [2021-08-12 18:53:14,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003213643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:14,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328772737] [2021-08-12 18:53:14,781 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 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 [2021-08-12 18:53:14,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:14,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328772737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:14,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:14,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987535956] [2021-08-12 18:53:14,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:14,881 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:15,873 INFO L93 Difference]: Finished difference Result 2471 states and 8303 transitions. [2021-08-12 18:53:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 18:53:15,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:15,878 INFO L225 Difference]: With dead ends: 2471 [2021-08-12 18:53:15,878 INFO L226 Difference]: Without dead ends: 2433 [2021-08-12 18:53:15,879 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:53:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-08-12 18:53:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-08-12 18:53:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-08-12 18:53:16,086 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-08-12 18:53:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:16,086 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-08-12 18:53:16,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-08-12 18:53:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:16,089 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:16,089 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:16,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 18:53:16,305 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-08-12 18:53:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:16,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831943223] [2021-08-12 18:53:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:16,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:16,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831943223] [2021-08-12 18:53:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831943223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084298805] [2021-08-12 18:53:16,341 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 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 [2021-08-12 18:53:16,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:53:16,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:16,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084298805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:16,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:16,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387502469] [2021-08-12 18:53:16,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:16,445 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:17,299 INFO L93 Difference]: Finished difference Result 2298 states and 7904 transitions. [2021-08-12 18:53:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 18:53:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-08-12 18:53:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:17,304 INFO L225 Difference]: With dead ends: 2298 [2021-08-12 18:53:17,304 INFO L226 Difference]: Without dead ends: 2263 [2021-08-12 18:53:17,305 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-12 18:53:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-08-12 18:53:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-08-12 18:53:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-08-12 18:53:17,511 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-08-12 18:53:17,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:17,511 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-08-12 18:53:17,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-08-12 18:53:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-08-12 18:53:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:17,514 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:17,514 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:17,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 18:53:17,730 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-08-12 18:53:17,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:17,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967010829] [2021-08-12 18:53:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:17,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:17,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967010829] [2021-08-12 18:53:17,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967010829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:17,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005093909] [2021-08-12 18:53:17,761 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 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 [2021-08-12 18:53:17,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:53:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:17,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005093909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:17,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:17,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:53:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263101346] [2021-08-12 18:53:17,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:53:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:53:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:53:17,847 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-08-12 18:53:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:19,044 INFO L93 Difference]: Finished difference Result 3172 states and 10578 transitions. [2021-08-12 18:53:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 18:53:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 21 [2021-08-12 18:53:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:19,051 INFO L225 Difference]: With dead ends: 3172 [2021-08-12 18:53:19,051 INFO L226 Difference]: Without dead ends: 3117 [2021-08-12 18:53:19,052 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-12 18:53:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-08-12 18:53:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-08-12 18:53:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-08-12 18:53:19,269 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-08-12 18:53:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:19,270 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-08-12 18:53:19,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-08-12 18:53:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-08-12 18:53:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:19,273 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:19,273 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:19,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:19,489 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-08-12 18:53:19,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:19,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026323549] [2021-08-12 18:53:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:19,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026323549] [2021-08-12 18:53:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026323549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887643233] [2021-08-12 18:53:19,516 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 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 [2021-08-12 18:53:19,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:53:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:19,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887643233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:19,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:19,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:19,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802840233] [2021-08-12 18:53:19,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:19,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:19,624 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:20,888 INFO L93 Difference]: Finished difference Result 2642 states and 8801 transitions. [2021-08-12 18:53:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:53:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:20,894 INFO L225 Difference]: With dead ends: 2642 [2021-08-12 18:53:20,894 INFO L226 Difference]: Without dead ends: 2586 [2021-08-12 18:53:20,894 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-08-12 18:53:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-08-12 18:53:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-08-12 18:53:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-08-12 18:53:21,148 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-08-12 18:53:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:21,149 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-08-12 18:53:21,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-08-12 18:53:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:21,152 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:21,152 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:21,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 18:53:21,368 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-08-12 18:53:21,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:21,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143984684] [2021-08-12 18:53:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:21,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:21,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143984684] [2021-08-12 18:53:21,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143984684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40568706] [2021-08-12 18:53:21,394 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 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 [2021-08-12 18:53:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:21,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40568706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:21,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:21,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:21,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661133678] [2021-08-12 18:53:21,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:21,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:21,493 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:22,797 INFO L93 Difference]: Finished difference Result 2752 states and 9089 transitions. [2021-08-12 18:53:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:53:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:22,804 INFO L225 Difference]: With dead ends: 2752 [2021-08-12 18:53:22,804 INFO L226 Difference]: Without dead ends: 2696 [2021-08-12 18:53:22,804 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:53:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-08-12 18:53:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-08-12 18:53:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 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) [2021-08-12 18:53:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-08-12 18:53:23,052 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-08-12 18:53:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:23,052 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-08-12 18:53:23,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-08-12 18:53:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:23,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:23,055 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:23,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 18:53:23,271 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-08-12 18:53:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:23,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213584591] [2021-08-12 18:53:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:23,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213584591] [2021-08-12 18:53:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213584591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660334340] [2021-08-12 18:53:23,300 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 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 [2021-08-12 18:53:23,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:23,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:23,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660334340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:23,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:23,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360785544] [2021-08-12 18:53:23,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:23,415 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:25,132 INFO L93 Difference]: Finished difference Result 3251 states and 10432 transitions. [2021-08-12 18:53:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:53:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-12 18:53:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:25,139 INFO L225 Difference]: With dead ends: 3251 [2021-08-12 18:53:25,140 INFO L226 Difference]: Without dead ends: 3185 [2021-08-12 18:53:25,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 18:53:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-08-12 18:53:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-08-12 18:53:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-08-12 18:53:25,405 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-08-12 18:53:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:25,405 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-08-12 18:53:25,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-12 18:53:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-08-12 18:53:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:25,410 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:25,410 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:25,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:25,626 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-08-12 18:53:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684187372] [2021-08-12 18:53:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:25,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684187372] [2021-08-12 18:53:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684187372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815622108] [2021-08-12 18:53:25,650 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 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 [2021-08-12 18:53:25,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:53:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:25,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815622108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:25,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:25,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:25,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255636023] [2021-08-12 18:53:25,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:25,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:25,764 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 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) [2021-08-12 18:53:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:27,850 INFO L93 Difference]: Finished difference Result 3572 states and 11409 transitions. [2021-08-12 18:53:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 18:53:27,850 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 [2021-08-12 18:53:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:27,858 INFO L225 Difference]: With dead ends: 3572 [2021-08-12 18:53:27,858 INFO L226 Difference]: Without dead ends: 3541 [2021-08-12 18:53:27,859 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 18:53:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-08-12 18:53:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-08-12 18:53:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-08-12 18:53:28,120 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-08-12 18:53:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:28,120 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-08-12 18:53:28,120 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) [2021-08-12 18:53:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-08-12 18:53:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:28,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:28,123 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:28,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-12 18:53:28,337 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-08-12 18:53:28,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:28,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816538387] [2021-08-12 18:53:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:28,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816538387] [2021-08-12 18:53:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816538387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608308263] [2021-08-12 18:53:28,369 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 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 [2021-08-12 18:53:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:28,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608308263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:28,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:28,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106551036] [2021-08-12 18:53:28,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:28,464 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 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) [2021-08-12 18:53:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:30,438 INFO L93 Difference]: Finished difference Result 3953 states and 12896 transitions. [2021-08-12 18:53:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:53:30,439 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 21 [2021-08-12 18:53:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:30,447 INFO L225 Difference]: With dead ends: 3953 [2021-08-12 18:53:30,447 INFO L226 Difference]: Without dead ends: 3900 [2021-08-12 18:53:30,448 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 18:53:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-08-12 18:53:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-08-12 18:53:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-08-12 18:53:30,726 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-08-12 18:53:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:30,727 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-08-12 18:53:30,727 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) [2021-08-12 18:53:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-08-12 18:53:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:30,729 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:30,729 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:30,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:30,945 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-08-12 18:53:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:30,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075056092] [2021-08-12 18:53:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:30,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:30,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075056092] [2021-08-12 18:53:30,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075056092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:30,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355220095] [2021-08-12 18:53:30,974 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 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 [2021-08-12 18:53:30,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:31,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355220095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:31,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:31,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497263355] [2021-08-12 18:53:31,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:31,066 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:33,167 INFO L93 Difference]: Finished difference Result 4131 states and 13622 transitions. [2021-08-12 18:53:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 18:53:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:53:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:33,178 INFO L225 Difference]: With dead ends: 4131 [2021-08-12 18:53:33,178 INFO L226 Difference]: Without dead ends: 4086 [2021-08-12 18:53:33,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 18:53:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-08-12 18:53:33,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-08-12 18:53:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-08-12 18:53:33,452 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-08-12 18:53:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:33,452 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-08-12 18:53:33,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-08-12 18:53:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:33,455 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:33,455 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:33,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-12 18:53:33,671 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-08-12 18:53:33,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:33,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883289119] [2021-08-12 18:53:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883289119] [2021-08-12 18:53:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883289119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366224057] [2021-08-12 18:53:33,705 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 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 [2021-08-12 18:53:33,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 18:53:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:33,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366224057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:33,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:33,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460769513] [2021-08-12 18:53:33,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:33,842 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 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) [2021-08-12 18:53:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:35,460 INFO L93 Difference]: Finished difference Result 3387 states and 11189 transitions. [2021-08-12 18:53:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 18:53:35,461 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 21 [2021-08-12 18:53:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:35,468 INFO L225 Difference]: With dead ends: 3387 [2021-08-12 18:53:35,469 INFO L226 Difference]: Without dead ends: 3334 [2021-08-12 18:53:35,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:53:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-08-12 18:53:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-08-12 18:53:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-08-12 18:53:35,728 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-08-12 18:53:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:35,728 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-08-12 18:53:35,728 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) [2021-08-12 18:53:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-08-12 18:53:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:35,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:35,731 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:35,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:35,946 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-08-12 18:53:35,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431440286] [2021-08-12 18:53:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:35,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431440286] [2021-08-12 18:53:35,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431440286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:35,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83837020] [2021-08-12 18:53:35,975 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 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 [2021-08-12 18:53:36,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:36,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83837020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:36,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:36,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:53:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989212368] [2021-08-12 18:53:36,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:53:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:53:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:53:36,090 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 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) [2021-08-12 18:53:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:37,629 INFO L93 Difference]: Finished difference Result 3235 states and 10733 transitions. [2021-08-12 18:53:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:53:37,630 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 21 [2021-08-12 18:53:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:37,637 INFO L225 Difference]: With dead ends: 3235 [2021-08-12 18:53:37,637 INFO L226 Difference]: Without dead ends: 3178 [2021-08-12 18:53:37,637 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-12 18:53:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-08-12 18:53:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-08-12 18:53:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-08-12 18:53:37,897 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-08-12 18:53:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:37,897 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-08-12 18:53:37,897 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) [2021-08-12 18:53:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-08-12 18:53:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:37,900 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:37,900 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:38,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 18:53:38,116 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-08-12 18:53:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:38,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620789270] [2021-08-12 18:53:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:38,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620789270] [2021-08-12 18:53:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620789270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286307682] [2021-08-12 18:53:38,149 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 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 [2021-08-12 18:53:38,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:53:38,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286307682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:38,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:38,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 18:53:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333324877] [2021-08-12 18:53:38,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:53:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:53:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:53:38,310 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:40,224 INFO L93 Difference]: Finished difference Result 3675 states and 12294 transitions. [2021-08-12 18:53:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:53:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-08-12 18:53:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:40,232 INFO L225 Difference]: With dead ends: 3675 [2021-08-12 18:53:40,232 INFO L226 Difference]: Without dead ends: 3630 [2021-08-12 18:53:40,233 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:53:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-08-12 18:53:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-08-12 18:53:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-08-12 18:53:40,488 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-08-12 18:53:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:40,488 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-08-12 18:53:40,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-08-12 18:53:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-08-12 18:53:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 18:53:40,491 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:40,491 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:40,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 18:53:40,707 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-08-12 18:53:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:40,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226067903] [2021-08-12 18:53:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:40,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226067903] [2021-08-12 18:53:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226067903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613176138] [2021-08-12 18:53:40,733 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 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 [2021-08-12 18:53:40,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 18:53:40,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 18:53:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613176138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:40,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:40,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 18:53:40,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49248726] [2021-08-12 18:53:40,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 18:53:40,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:40,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 18:53:40,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 18:53:40,825 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-08-12 18:53:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:42,706 INFO L93 Difference]: Finished difference Result 3501 states and 11593 transitions. [2021-08-12 18:53:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 18:53:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 21 [2021-08-12 18:53:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:42,714 INFO L225 Difference]: With dead ends: 3501 [2021-08-12 18:53:42,714 INFO L226 Difference]: Without dead ends: 3446 [2021-08-12 18:53:42,715 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-08-12 18:53:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-08-12 18:53:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-08-12 18:53:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-08-12 18:53:42,988 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-08-12 18:53:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:42,988 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-08-12 18:53:42,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-08-12 18:53:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-08-12 18:53:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:53:42,991 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:42,991 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:43,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 18:53:43,199 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-08-12 18:53:43,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:43,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650513698] [2021-08-12 18:53:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:43,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650513698] [2021-08-12 18:53:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650513698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876221494] [2021-08-12 18:53:43,288 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 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 [2021-08-12 18:53:43,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:43,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:53:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:43,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876221494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:43,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:43,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-12 18:53:43,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866281401] [2021-08-12 18:53:43,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 18:53:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 18:53:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:53:43,462 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-08-12 18:53:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:44,955 INFO L93 Difference]: Finished difference Result 3315 states and 11227 transitions. [2021-08-12 18:53:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:53:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 23 [2021-08-12 18:53:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:44,963 INFO L225 Difference]: With dead ends: 3315 [2021-08-12 18:53:44,963 INFO L226 Difference]: Without dead ends: 3283 [2021-08-12 18:53:44,964 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:53:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-08-12 18:53:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-08-12 18:53:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-08-12 18:53:45,315 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-08-12 18:53:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:45,315 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-08-12 18:53:45,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-08-12 18:53:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-08-12 18:53:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:53:45,319 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:45,319 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:45,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 18:53:45,536 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-08-12 18:53:45,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:45,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509408731] [2021-08-12 18:53:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:53:45,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509408731] [2021-08-12 18:53:45,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509408731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052926163] [2021-08-12 18:53:45,589 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 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 [2021-08-12 18:53:45,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:53:45,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:53:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:45,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052926163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:45,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:45,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:45,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341452607] [2021-08-12 18:53:45,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:45,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:45,708 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:47,532 INFO L93 Difference]: Finished difference Result 3952 states and 13554 transitions. [2021-08-12 18:53:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 18:53:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 23 [2021-08-12 18:53:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:47,542 INFO L225 Difference]: With dead ends: 3952 [2021-08-12 18:53:47,542 INFO L226 Difference]: Without dead ends: 3891 [2021-08-12 18:53:47,543 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-08-12 18:53:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-08-12 18:53:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-08-12 18:53:48,010 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-08-12 18:53:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:48,010 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-08-12 18:53:48,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-08-12 18:53:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:53:48,015 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:48,015 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:48,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 18:53:48,231 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-08-12 18:53:48,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:48,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025752176] [2021-08-12 18:53:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:48,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025752176] [2021-08-12 18:53:48,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025752176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669392386] [2021-08-12 18:53:48,281 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 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 [2021-08-12 18:53:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:53:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669392386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:48,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:48,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:48,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007484001] [2021-08-12 18:53:48,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:48,442 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:49,934 INFO L93 Difference]: Finished difference Result 3641 states and 12729 transitions. [2021-08-12 18:53:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:53:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 23 [2021-08-12 18:53:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:49,943 INFO L225 Difference]: With dead ends: 3641 [2021-08-12 18:53:49,944 INFO L226 Difference]: Without dead ends: 3609 [2021-08-12 18:53:49,944 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:53:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-08-12 18:53:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-08-12 18:53:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-08-12 18:53:50,405 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-08-12 18:53:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-08-12 18:53:50,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-08-12 18:53:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 18:53:50,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:50,411 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-12 18:53:50,625 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-08-12 18:53:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389977539] [2021-08-12 18:53:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:50,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389977539] [2021-08-12 18:53:50,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389977539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166660105] [2021-08-12 18:53:50,679 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 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 [2021-08-12 18:53:50,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:53:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 18:53:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:50,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166660105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:50,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:50,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 18:53:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429781600] [2021-08-12 18:53:50,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:53:50,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:53:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:53:50,780 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:52,383 INFO L93 Difference]: Finished difference Result 3653 states and 12788 transitions. [2021-08-12 18:53:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 18:53:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 23 [2021-08-12 18:53:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:52,392 INFO L225 Difference]: With dead ends: 3653 [2021-08-12 18:53:52,393 INFO L226 Difference]: Without dead ends: 3621 [2021-08-12 18:53:52,393 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 18:53:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-08-12 18:53:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-08-12 18:53:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-08-12 18:53:52,850 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-08-12 18:53:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:52,850 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-08-12 18:53:52,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-12 18:53:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-08-12 18:53:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:53:52,855 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:52,855 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:53,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:53,072 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-08-12 18:53:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:53,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810959964] [2021-08-12 18:53:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:53,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810959964] [2021-08-12 18:53:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810959964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773514033] [2021-08-12 18:53:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:53,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:53:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:53:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:53,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773514033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:53,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:53,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 18:53:53,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143608411] [2021-08-12 18:53:53,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:53:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:53:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:53:53,231 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:53:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:53:56,029 INFO L93 Difference]: Finished difference Result 5520 states and 18926 transitions. [2021-08-12 18:53:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 18:53:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-08-12 18:53:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:53:56,042 INFO L225 Difference]: With dead ends: 5520 [2021-08-12 18:53:56,042 INFO L226 Difference]: Without dead ends: 5445 [2021-08-12 18:53:56,043 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:53:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-08-12 18:53:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-08-12 18:53:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:53:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-08-12 18:53:56,580 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-08-12 18:53:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:53:56,580 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-08-12 18:53:56,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:53:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-08-12 18:53:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:53:56,587 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:53:56,587 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:53:56,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:53:56,795 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:53:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:53:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-08-12 18:53:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:53:56,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758155347] [2021-08-12 18:53:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:53:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:53:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:56,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:53:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758155347] [2021-08-12 18:53:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758155347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258702605] [2021-08-12 18:53:56,837 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 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 [2021-08-12 18:53:56,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:53:56,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:53:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:53:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:53:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:53:56,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258702605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:53:56,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:53:56,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:53:56,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426064301] [2021-08-12 18:53:56,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:53:56,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:53:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:53:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:53:56,966 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:54:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:00,122 INFO L93 Difference]: Finished difference Result 5903 states and 20603 transitions. [2021-08-12 18:54:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:54:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 18:54:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:00,138 INFO L225 Difference]: With dead ends: 5903 [2021-08-12 18:54:00,138 INFO L226 Difference]: Without dead ends: 5828 [2021-08-12 18:54:00,139 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-08-12 18:54:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-08-12 18:54:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-08-12 18:54:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-08-12 18:54:00,901 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-08-12 18:54:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:00,901 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-08-12 18:54:00,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:54:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-08-12 18:54:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:00,909 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:00,909 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:01,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:01,122 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-08-12 18:54:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:01,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714985011] [2021-08-12 18:54:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:01,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:01,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714985011] [2021-08-12 18:54:01,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714985011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:01,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029590301] [2021-08-12 18:54:01,189 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 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 [2021-08-12 18:54:01,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:54:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029590301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:01,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:01,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930610241] [2021-08-12 18:54:01,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:01,375 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:04,342 INFO L93 Difference]: Finished difference Result 5146 states and 17696 transitions. [2021-08-12 18:54:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 18:54:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:54:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:04,397 INFO L225 Difference]: With dead ends: 5146 [2021-08-12 18:54:04,397 INFO L226 Difference]: Without dead ends: 5076 [2021-08-12 18:54:04,398 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 18:54:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-08-12 18:54:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-08-12 18:54:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 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) [2021-08-12 18:54:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-08-12 18:54:04,992 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-08-12 18:54:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:04,993 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-08-12 18:54:04,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-08-12 18:54:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:04,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:04,999 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:05,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:05,215 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-08-12 18:54:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:05,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125109629] [2021-08-12 18:54:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:05,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:05,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125109629] [2021-08-12 18:54:05,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125109629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:05,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826567372] [2021-08-12 18:54:05,253 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 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 [2021-08-12 18:54:05,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:54:05,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:05,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826567372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:05,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:05,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:05,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530155168] [2021-08-12 18:54:05,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:05,387 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 18:54:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:12,481 INFO L93 Difference]: Finished difference Result 9076 states and 29229 transitions. [2021-08-12 18:54:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-12 18:54:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-08-12 18:54:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:12,501 INFO L225 Difference]: With dead ends: 9076 [2021-08-12 18:54:12,501 INFO L226 Difference]: Without dead ends: 9010 [2021-08-12 18:54:12,503 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1414.9ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-08-12 18:54:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-08-12 18:54:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-08-12 18:54:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-08-12 18:54:13,282 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-08-12 18:54:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:13,282 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-08-12 18:54:13,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 18:54:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-08-12 18:54:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:13,289 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:13,289 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:13,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 18:54:13,507 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-08-12 18:54:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:13,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408791659] [2021-08-12 18:54:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:13,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408791659] [2021-08-12 18:54:13,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408791659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755501479] [2021-08-12 18:54:13,539 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 [2021-08-12 18:54:13,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:54:13,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:54:13,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:13,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755501479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:13,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:13,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:54:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172182548] [2021-08-12 18:54:13,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:54:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:54:13,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:54:13,694 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 18:54:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:22,877 INFO L93 Difference]: Finished difference Result 13633 states and 45773 transitions. [2021-08-12 18:54:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-12 18:54:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-08-12 18:54:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:22,913 INFO L225 Difference]: With dead ends: 13633 [2021-08-12 18:54:22,913 INFO L226 Difference]: Without dead ends: 13548 [2021-08-12 18:54:22,916 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 686.2ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-08-12 18:54:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-08-12 18:54:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-08-12 18:54:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-08-12 18:54:23,974 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-08-12 18:54:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-08-12 18:54:23,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-08-12 18:54:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-08-12 18:54:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:23,990 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:23,990 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:24,205 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-08-12 18:54:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745945649] [2021-08-12 18:54:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:24,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:24,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745945649] [2021-08-12 18:54:24,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745945649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:24,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395634539] [2021-08-12 18:54:24,239 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 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 [2021-08-12 18:54:24,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:54:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:54:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:24,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395634539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:24,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:24,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:54:24,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470108536] [2021-08-12 18:54:24,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:54:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:54:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:54:24,395 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:54:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:35,404 INFO L93 Difference]: Finished difference Result 16151 states and 54715 transitions. [2021-08-12 18:54:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 18:54:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 18:54:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:35,443 INFO L225 Difference]: With dead ends: 16151 [2021-08-12 18:54:35,444 INFO L226 Difference]: Without dead ends: 16076 [2021-08-12 18:54:35,448 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 18:54:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-08-12 18:54:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-08-12 18:54:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-08-12 18:54:36,401 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-08-12 18:54:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:36,402 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-08-12 18:54:36,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:54:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-08-12 18:54:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:36,409 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:36,409 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:36,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 18:54:36,625 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-08-12 18:54:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:36,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743089705] [2021-08-12 18:54:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:36,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:36,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743089705] [2021-08-12 18:54:36,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743089705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:36,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496793791] [2021-08-12 18:54:36,682 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 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 [2021-08-12 18:54:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:36,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496793791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:36,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:36,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401525287] [2021-08-12 18:54:36,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:36,857 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:43,469 INFO L93 Difference]: Finished difference Result 8986 states and 29770 transitions. [2021-08-12 18:54:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-12 18:54:43,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:54:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:43,490 INFO L225 Difference]: With dead ends: 8986 [2021-08-12 18:54:43,491 INFO L226 Difference]: Without dead ends: 8899 [2021-08-12 18:54:43,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 910.5ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 18:54:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-08-12 18:54:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-08-12 18:54:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-08-12 18:54:44,410 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-08-12 18:54:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:44,410 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-08-12 18:54:44,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-08-12 18:54:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:44,418 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:44,418 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:44,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:44,633 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-08-12 18:54:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:44,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931364606] [2021-08-12 18:54:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:44,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:44,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931364606] [2021-08-12 18:54:44,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931364606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:44,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662967647] [2021-08-12 18:54:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 18:54:44,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:54:44,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662967647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:44,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:44,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:44,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269116970] [2021-08-12 18:54:44,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:44,846 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:51,293 INFO L93 Difference]: Finished difference Result 8815 states and 29433 transitions. [2021-08-12 18:54:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 18:54:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:54:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:51,312 INFO L225 Difference]: With dead ends: 8815 [2021-08-12 18:54:51,312 INFO L226 Difference]: Without dead ends: 8707 [2021-08-12 18:54:51,313 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 18:54:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-08-12 18:54:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-08-12 18:54:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-08-12 18:54:52,241 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-08-12 18:54:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:52,242 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-08-12 18:54:52,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-08-12 18:54:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:52,251 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:52,252 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:52,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 18:54:52,454 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-08-12 18:54:52,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:52,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925218052] [2021-08-12 18:54:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:52,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925218052] [2021-08-12 18:54:52,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925218052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759145563] [2021-08-12 18:54:52,529 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 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 [2021-08-12 18:54:52,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 18:54:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:52,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759145563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:52,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:52,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:52,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700551944] [2021-08-12 18:54:52,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:52,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:52,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:52,718 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:54:56,776 INFO L93 Difference]: Finished difference Result 6804 states and 23833 transitions. [2021-08-12 18:54:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 18:54:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:54:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:54:56,793 INFO L225 Difference]: With dead ends: 6804 [2021-08-12 18:54:56,794 INFO L226 Difference]: Without dead ends: 6734 [2021-08-12 18:54:56,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 18:54:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-08-12 18:54:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-08-12 18:54:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:54:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-08-12 18:54:57,773 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-08-12 18:54:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:54:57,773 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-08-12 18:54:57,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:54:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-08-12 18:54:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:54:57,782 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:54:57,782 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:54:57,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:54:57,986 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:54:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:54:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-08-12 18:54:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:54:57,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867035634] [2021-08-12 18:54:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:54:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:54:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:58,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:54:58,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867035634] [2021-08-12 18:54:58,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867035634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:58,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451872145] [2021-08-12 18:54:58,030 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 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 [2021-08-12 18:54:58,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:54:58,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:54:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:54:58,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:54:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:54:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451872145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:54:58,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:54:58,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:54:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28733648] [2021-08-12 18:54:58,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:54:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:54:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:54:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:54:58,249 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:55:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:03,546 INFO L93 Difference]: Finished difference Result 7686 states and 26291 transitions. [2021-08-12 18:55:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 18:55:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:55:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:03,565 INFO L225 Difference]: With dead ends: 7686 [2021-08-12 18:55:03,565 INFO L226 Difference]: Without dead ends: 7578 [2021-08-12 18:55:03,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 18:55:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-08-12 18:55:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-08-12 18:55:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-08-12 18:55:04,561 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-08-12 18:55:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-08-12 18:55:04,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:55:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-08-12 18:55:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:04,571 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:04,571 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:04,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:04,785 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:04,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-08-12 18:55:04,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:04,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627089907] [2021-08-12 18:55:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:04,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627089907] [2021-08-12 18:55:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627089907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:04,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232478330] [2021-08-12 18:55:04,821 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 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 [2021-08-12 18:55:04,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 18:55:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232478330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:04,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:04,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:55:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21872021] [2021-08-12 18:55:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:55:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:55:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:55:04,962 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:55:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:11,084 INFO L93 Difference]: Finished difference Result 8419 states and 28475 transitions. [2021-08-12 18:55:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 18:55:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:55:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:11,104 INFO L225 Difference]: With dead ends: 8419 [2021-08-12 18:55:11,105 INFO L226 Difference]: Without dead ends: 8346 [2021-08-12 18:55:11,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 18:55:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-08-12 18:55:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-08-12 18:55:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-08-12 18:55:12,282 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-08-12 18:55:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:12,282 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-08-12 18:55:12,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:55:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-08-12 18:55:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:12,293 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:12,293 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:12,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-08-12 18:55:12,510 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-08-12 18:55:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:12,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127462117] [2021-08-12 18:55:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:12,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127462117] [2021-08-12 18:55:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127462117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430492658] [2021-08-12 18:55:12,546 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 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 [2021-08-12 18:55:12,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:55:12,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:12,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:12,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:12,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430492658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:12,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:12,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:55:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983662602] [2021-08-12 18:55:12,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:55:12,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:12,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:55:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:55:12,685 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-08-12 18:55:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:19,344 INFO L93 Difference]: Finished difference Result 8631 states and 29107 transitions. [2021-08-12 18:55:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 18:55:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-08-12 18:55:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:19,363 INFO L225 Difference]: With dead ends: 8631 [2021-08-12 18:55:19,363 INFO L226 Difference]: Without dead ends: 8581 [2021-08-12 18:55:19,365 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 18:55:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-08-12 18:55:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-08-12 18:55:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-08-12 18:55:20,542 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-08-12 18:55:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:20,542 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-08-12 18:55:20,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-08-12 18:55:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-08-12 18:55:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:20,553 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:20,554 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:20,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:20,757 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-08-12 18:55:20,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:20,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4789774] [2021-08-12 18:55:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:20,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:20,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4789774] [2021-08-12 18:55:20,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4789774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:20,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251930678] [2021-08-12 18:55:20,817 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 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 [2021-08-12 18:55:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:55:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251930678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:20,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:20,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-08-12 18:55:20,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197836530] [2021-08-12 18:55:20,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:55:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:55:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:55:20,895 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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) [2021-08-12 18:55:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:26,043 INFO L93 Difference]: Finished difference Result 8453 states and 28947 transitions. [2021-08-12 18:55:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:55:26,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 [2021-08-12 18:55:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:26,063 INFO L225 Difference]: With dead ends: 8453 [2021-08-12 18:55:26,063 INFO L226 Difference]: Without dead ends: 8384 [2021-08-12 18:55:26,064 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-08-12 18:55:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-08-12 18:55:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-08-12 18:55:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-08-12 18:55:27,183 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-08-12 18:55:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:27,184 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-08-12 18:55:27,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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) [2021-08-12 18:55:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-08-12 18:55:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:27,192 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:27,192 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:27,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:27,408 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-08-12 18:55:27,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:27,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192479688] [2021-08-12 18:55:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:27,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:27,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192479688] [2021-08-12 18:55:27,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192479688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:27,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373511283] [2021-08-12 18:55:27,436 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 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 [2021-08-12 18:55:27,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:55:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373511283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:27,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:27,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:55:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041214847] [2021-08-12 18:55:27,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:55:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:55:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:55:27,586 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:55:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:36,601 INFO L93 Difference]: Finished difference Result 10722 states and 35652 transitions. [2021-08-12 18:55:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-12 18:55:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-08-12 18:55:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:36,627 INFO L225 Difference]: With dead ends: 10722 [2021-08-12 18:55:36,628 INFO L226 Difference]: Without dead ends: 10663 [2021-08-12 18:55:36,630 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 18:55:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-08-12 18:55:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-08-12 18:55:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-08-12 18:55:37,909 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-08-12 18:55:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:37,909 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-08-12 18:55:37,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:55:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-08-12 18:55:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:37,922 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:37,922 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:38,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 18:55:38,141 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-08-12 18:55:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676759354] [2021-08-12 18:55:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:38,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:38,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676759354] [2021-08-12 18:55:38,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676759354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:38,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548183098] [2021-08-12 18:55:38,186 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 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 [2021-08-12 18:55:38,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:55:38,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548183098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:38,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:38,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:55:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151622327] [2021-08-12 18:55:38,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:55:38,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:55:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:55:38,316 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:55:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:46,046 INFO L93 Difference]: Finished difference Result 9504 states and 31931 transitions. [2021-08-12 18:55:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 18:55:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:55:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:46,069 INFO L225 Difference]: With dead ends: 9504 [2021-08-12 18:55:46,070 INFO L226 Difference]: Without dead ends: 9417 [2021-08-12 18:55:46,071 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 18:55:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-08-12 18:55:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-08-12 18:55:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-08-12 18:55:47,300 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-08-12 18:55:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:47,300 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-08-12 18:55:47,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:55:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-08-12 18:55:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:47,310 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:47,310 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:47,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:55:47,515 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-08-12 18:55:47,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:47,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017940302] [2021-08-12 18:55:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:47,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017940302] [2021-08-12 18:55:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017940302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220405831] [2021-08-12 18:55:47,557 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 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 [2021-08-12 18:55:47,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:55:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220405831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:47,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:47,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:55:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836094989] [2021-08-12 18:55:47,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:55:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:55:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:55:47,760 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:55:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:55:57,617 INFO L93 Difference]: Finished difference Result 11238 states and 37574 transitions. [2021-08-12 18:55:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-12 18:55:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-08-12 18:55:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:55:57,648 INFO L225 Difference]: With dead ends: 11238 [2021-08-12 18:55:57,648 INFO L226 Difference]: Without dead ends: 11207 [2021-08-12 18:55:57,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1272.7ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 18:55:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-08-12 18:55:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-08-12 18:55:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:55:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-08-12 18:55:58,986 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-08-12 18:55:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:55:58,986 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-08-12 18:55:58,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:55:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-08-12 18:55:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:55:58,996 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:55:58,996 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:55:59,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-12 18:55:59,200 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:55:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:55:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-08-12 18:55:59,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:55:59,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999214416] [2021-08-12 18:55:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:55:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:55:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:59,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:55:59,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999214416] [2021-08-12 18:55:59,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999214416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:59,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153680052] [2021-08-12 18:55:59,243 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 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 [2021-08-12 18:55:59,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:55:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:55:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:55:59,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:55:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:55:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153680052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:55:59,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:55:59,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:55:59,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764835131] [2021-08-12 18:55:59,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:55:59,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:55:59,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:55:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:55:59,375 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:56:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:07,959 INFO L93 Difference]: Finished difference Result 10746 states and 36038 transitions. [2021-08-12 18:56:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 18:56:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-08-12 18:56:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:07,984 INFO L225 Difference]: With dead ends: 10746 [2021-08-12 18:56:07,984 INFO L226 Difference]: Without dead ends: 10668 [2021-08-12 18:56:07,986 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-08-12 18:56:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-08-12 18:56:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-08-12 18:56:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-08-12 18:56:09,222 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-08-12 18:56:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:09,222 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-08-12 18:56:09,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:56:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-08-12 18:56:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:56:09,231 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:09,231 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:09,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-12 18:56:09,445 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-08-12 18:56:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:09,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540062451] [2021-08-12 18:56:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:09,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:09,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540062451] [2021-08-12 18:56:09,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540062451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:09,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723876242] [2021-08-12 18:56:09,473 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 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 [2021-08-12 18:56:09,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:56:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:56:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:09,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723876242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:09,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:09,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:56:09,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387171505] [2021-08-12 18:56:09,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:09,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:09,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:09,602 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:17,443 INFO L93 Difference]: Finished difference Result 9734 states and 32617 transitions. [2021-08-12 18:56:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 18:56:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:56:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:17,466 INFO L225 Difference]: With dead ends: 9734 [2021-08-12 18:56:17,466 INFO L226 Difference]: Without dead ends: 9654 [2021-08-12 18:56:17,467 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 18:56:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-08-12 18:56:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-08-12 18:56:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-08-12 18:56:18,693 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-08-12 18:56:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:18,693 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-08-12 18:56:18,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-08-12 18:56:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:56:18,702 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:18,702 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:18,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 18:56:18,918 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:18,918 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-08-12 18:56:18,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:18,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452696178] [2021-08-12 18:56:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:18,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452696178] [2021-08-12 18:56:18,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452696178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806417644] [2021-08-12 18:56:18,945 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 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 [2021-08-12 18:56:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:56:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:19,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806417644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:19,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:19,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:56:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184472895] [2021-08-12 18:56:19,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:19,069 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 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) [2021-08-12 18:56:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:28,178 INFO L93 Difference]: Finished difference Result 10298 states and 34226 transitions. [2021-08-12 18:56:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 18:56:28,178 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 25 [2021-08-12 18:56:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:28,200 INFO L225 Difference]: With dead ends: 10298 [2021-08-12 18:56:28,200 INFO L226 Difference]: Without dead ends: 10241 [2021-08-12 18:56:28,201 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 18:56:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-08-12 18:56:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-08-12 18:56:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-08-12 18:56:29,457 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-08-12 18:56:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:29,457 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-08-12 18:56:29,457 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) [2021-08-12 18:56:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-08-12 18:56:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:56:29,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:29,466 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:29,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:29,681 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-08-12 18:56:29,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:29,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023237794] [2021-08-12 18:56:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:29,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023237794] [2021-08-12 18:56:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023237794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104545588] [2021-08-12 18:56:29,709 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 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 [2021-08-12 18:56:29,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:56:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:56:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:29,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104545588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:29,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:29,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:56:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349112220] [2021-08-12 18:56:29,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:29,837 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:38,371 INFO L93 Difference]: Finished difference Result 10738 states and 36531 transitions. [2021-08-12 18:56:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 18:56:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:56:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:38,396 INFO L225 Difference]: With dead ends: 10738 [2021-08-12 18:56:38,396 INFO L226 Difference]: Without dead ends: 10630 [2021-08-12 18:56:38,398 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 18:56:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-08-12 18:56:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-08-12 18:56:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-08-12 18:56:39,658 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-08-12 18:56:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:39,658 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-08-12 18:56:39,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-08-12 18:56:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:56:39,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:39,670 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:39,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:39,889 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-08-12 18:56:39,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:39,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465198447] [2021-08-12 18:56:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:39,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:39,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465198447] [2021-08-12 18:56:39,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465198447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:39,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453659376] [2021-08-12 18:56:39,918 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 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 [2021-08-12 18:56:39,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:56:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:39,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:56:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:40,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453659376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:40,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:40,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:56:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203985081] [2021-08-12 18:56:40,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:40,047 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:56:49,457 INFO L93 Difference]: Finished difference Result 11325 states and 38343 transitions. [2021-08-12 18:56:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-12 18:56:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:56:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:56:49,483 INFO L225 Difference]: With dead ends: 11325 [2021-08-12 18:56:49,483 INFO L226 Difference]: Without dead ends: 11245 [2021-08-12 18:56:49,484 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 766.0ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 18:56:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-08-12 18:56:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-08-12 18:56:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:56:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-08-12 18:56:50,862 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-08-12 18:56:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:56:50,862 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-08-12 18:56:50,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:56:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-08-12 18:56:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:56:50,872 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:56:50,872 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:56:51,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:56:51,088 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:56:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:56:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-08-12 18:56:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:56:51,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003508320] [2021-08-12 18:56:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:56:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:56:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:51,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:56:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003508320] [2021-08-12 18:56:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003508320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365560291] [2021-08-12 18:56:51,118 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 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 [2021-08-12 18:56:51,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:56:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:56:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:56:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:56:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:56:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365560291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:56:51,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:56:51,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:56:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765254045] [2021-08-12 18:56:51,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:56:51,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:56:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:56:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:56:51,252 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 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) [2021-08-12 18:57:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:01,490 INFO L93 Difference]: Finished difference Result 11695 states and 39356 transitions. [2021-08-12 18:57:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-12 18:57:01,490 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 25 [2021-08-12 18:57:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:01,518 INFO L225 Difference]: With dead ends: 11695 [2021-08-12 18:57:01,519 INFO L226 Difference]: Without dead ends: 11645 [2021-08-12 18:57:01,521 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1045.2ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-08-12 18:57:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-08-12 18:57:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-08-12 18:57:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-08-12 18:57:02,949 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-08-12 18:57:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:02,950 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-08-12 18:57:02,950 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) [2021-08-12 18:57:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-08-12 18:57:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:57:02,960 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:02,960 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:03,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:03,176 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-08-12 18:57:03,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:03,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045423841] [2021-08-12 18:57:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:57:03,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:03,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045423841] [2021-08-12 18:57:03,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045423841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:03,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130169327] [2021-08-12 18:57:03,207 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 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 [2021-08-12 18:57:03,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 18:57:03,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:03,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:57:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:03,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130169327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:03,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:03,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-12 18:57:03,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756515131] [2021-08-12 18:57:03,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:57:03,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:57:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:57:03,292 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2021-08-12 18:57:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:14,522 INFO L93 Difference]: Finished difference Result 17657 states and 61494 transitions. [2021-08-12 18:57:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:57:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 [2021-08-12 18:57:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:14,571 INFO L225 Difference]: With dead ends: 17657 [2021-08-12 18:57:14,571 INFO L226 Difference]: Without dead ends: 17556 [2021-08-12 18:57:14,575 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-08-12 18:57:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-08-12 18:57:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-08-12 18:57:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-08-12 18:57:16,484 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-08-12 18:57:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:16,484 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-08-12 18:57:16,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2021-08-12 18:57:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-08-12 18:57:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:57:16,499 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:16,499 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:16,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-12 18:57:16,716 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-08-12 18:57:16,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:16,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761432341] [2021-08-12 18:57:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:16,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761432341] [2021-08-12 18:57:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761432341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912730800] [2021-08-12 18:57:16,747 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 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 [2021-08-12 18:57:16,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 18:57:16,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:57:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912730800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:16,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:16,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-12 18:57:16,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663573156] [2021-08-12 18:57:16,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 18:57:16,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 18:57:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 18:57:16,824 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2021-08-12 18:57:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:26,084 INFO L93 Difference]: Finished difference Result 14588 states and 51369 transitions. [2021-08-12 18:57:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 18:57:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 [2021-08-12 18:57:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:26,123 INFO L225 Difference]: With dead ends: 14588 [2021-08-12 18:57:26,123 INFO L226 Difference]: Without dead ends: 14473 [2021-08-12 18:57:26,126 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-08-12 18:57:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-08-12 18:57:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-08-12 18:57:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-08-12 18:57:28,005 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-08-12 18:57:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:28,005 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-08-12 18:57:28,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2021-08-12 18:57:28,006 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-08-12 18:57:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:57:28,019 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:28,020 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:28,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:28,233 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-08-12 18:57:28,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:28,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096500067] [2021-08-12 18:57:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:57:28,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096500067] [2021-08-12 18:57:28,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096500067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:28,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126422702] [2021-08-12 18:57:28,270 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 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 [2021-08-12 18:57:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 18:57:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:57:28,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126422702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:28,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:28,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-08-12 18:57:28,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259113891] [2021-08-12 18:57:28,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 18:57:28,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 18:57:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 18:57:28,350 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 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) [2021-08-12 18:57:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:37,405 INFO L93 Difference]: Finished difference Result 13701 states and 48069 transitions. [2021-08-12 18:57:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 18:57:37,405 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 25 [2021-08-12 18:57:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:37,447 INFO L225 Difference]: With dead ends: 13701 [2021-08-12 18:57:37,447 INFO L226 Difference]: Without dead ends: 13610 [2021-08-12 18:57:37,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-08-12 18:57:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-08-12 18:57:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-08-12 18:57:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-08-12 18:57:39,513 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-08-12 18:57:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:39,513 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-08-12 18:57:39,513 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) [2021-08-12 18:57:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-08-12 18:57:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:57:39,525 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:39,525 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:39,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:57:39,742 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-08-12 18:57:39,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:39,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631934908] [2021-08-12 18:57:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:39,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631934908] [2021-08-12 18:57:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631934908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623133996] [2021-08-12 18:57:39,770 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 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 [2021-08-12 18:57:39,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:57:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:57:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:57:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623133996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:39,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:39,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:57:39,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347985213] [2021-08-12 18:57:39,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:57:39,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:57:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:57:39,901 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:57:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:57:51,072 INFO L93 Difference]: Finished difference Result 12111 states and 41894 transitions. [2021-08-12 18:57:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-12 18:57:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-08-12 18:57:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:57:51,104 INFO L225 Difference]: With dead ends: 12111 [2021-08-12 18:57:51,104 INFO L226 Difference]: Without dead ends: 12080 [2021-08-12 18:57:51,106 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1313.9ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 18:57:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-08-12 18:57:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-08-12 18:57:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:57:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-08-12 18:57:53,018 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-08-12 18:57:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:57:53,018 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-08-12 18:57:53,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-12 18:57:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-08-12 18:57:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:57:53,031 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:57:53,031 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:57:53,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-12 18:57:53,246 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:57:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:57:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-08-12 18:57:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:57:53,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188741263] [2021-08-12 18:57:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:57:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:57:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:57:53,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:57:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188741263] [2021-08-12 18:57:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188741263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8283075] [2021-08-12 18:57:53,273 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 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 [2021-08-12 18:57:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:57:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:57:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:57:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:57:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:57:53,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8283075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:57:53,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:57:53,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:57:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631390059] [2021-08-12 18:57:53,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:57:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:57:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:57:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:57:53,406 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:03,035 INFO L93 Difference]: Finished difference Result 10992 states and 38480 transitions. [2021-08-12 18:58:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 18:58:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:58:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:03,062 INFO L225 Difference]: With dead ends: 10992 [2021-08-12 18:58:03,062 INFO L226 Difference]: Without dead ends: 10947 [2021-08-12 18:58:03,063 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 18:58:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-08-12 18:58:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-08-12 18:58:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-08-12 18:58:04,775 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-08-12 18:58:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:04,775 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-08-12 18:58:04,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-08-12 18:58:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:58:04,787 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:04,788 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:05,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:05,004 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-08-12 18:58:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:05,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910789600] [2021-08-12 18:58:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 18:58:05,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:05,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910789600] [2021-08-12 18:58:05,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910789600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:05,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621183841] [2021-08-12 18:58:05,034 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 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 [2021-08-12 18:58:05,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:58:05,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:58:05,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621183841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:05,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:58:05,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24406198] [2021-08-12 18:58:05,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:58:05,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:58:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:58:05,162 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:14,092 INFO L93 Difference]: Finished difference Result 10797 states and 38009 transitions. [2021-08-12 18:58:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-12 18:58:14,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:58:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:14,118 INFO L225 Difference]: With dead ends: 10797 [2021-08-12 18:58:14,118 INFO L226 Difference]: Without dead ends: 10689 [2021-08-12 18:58:14,121 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 18:58:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-08-12 18:58:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-08-12 18:58:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-08-12 18:58:15,935 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-08-12 18:58:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:15,935 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-08-12 18:58:15,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-08-12 18:58:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:58:15,947 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:15,947 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:16,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-12 18:58:16,163 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-08-12 18:58:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:16,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917886880] [2021-08-12 18:58:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:16,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917886880] [2021-08-12 18:58:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917886880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530211890] [2021-08-12 18:58:16,231 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 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 [2021-08-12 18:58:16,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 18:58:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:58:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:16,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530211890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:16,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:16,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:58:16,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116816817] [2021-08-12 18:58:16,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:58:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:58:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:58:16,444 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 18:58:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:23,180 INFO L93 Difference]: Finished difference Result 9236 states and 33331 transitions. [2021-08-12 18:58:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 18:58:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-08-12 18:58:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:23,203 INFO L225 Difference]: With dead ends: 9236 [2021-08-12 18:58:23,203 INFO L226 Difference]: Without dead ends: 9187 [2021-08-12 18:58:23,205 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 18:58:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-08-12 18:58:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-08-12 18:58:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-08-12 18:58:24,986 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-08-12 18:58:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:24,986 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-08-12 18:58:24,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 18:58:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-08-12 18:58:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:58:24,999 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:24,999 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:25,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:58:25,207 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-08-12 18:58:25,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:25,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021146729] [2021-08-12 18:58:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:25,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:25,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021146729] [2021-08-12 18:58:25,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021146729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:25,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447905842] [2021-08-12 18:58:25,250 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 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 [2021-08-12 18:58:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:25,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:58:25,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447905842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:25,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:25,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 18:58:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852018074] [2021-08-12 18:58:25,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:58:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:58:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:58:25,367 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:58:40,772 INFO L93 Difference]: Finished difference Result 19869 states and 70266 transitions. [2021-08-12 18:58:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 18:58:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:58:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:58:40,821 INFO L225 Difference]: With dead ends: 19869 [2021-08-12 18:58:40,822 INFO L226 Difference]: Without dead ends: 19766 [2021-08-12 18:58:40,826 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 18:58:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-08-12 18:58:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-08-12 18:58:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:58:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-08-12 18:58:43,007 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-08-12 18:58:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:58:43,007 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-08-12 18:58:43,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:58:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-08-12 18:58:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:58:43,022 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:58:43,022 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:58:43,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-12 18:58:43,238 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:58:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:58:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-08-12 18:58:43,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:58:43,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581362650] [2021-08-12 18:58:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:58:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:58:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:43,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:58:43,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581362650] [2021-08-12 18:58:43,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581362650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:43,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849129341] [2021-08-12 18:58:43,270 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 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 [2021-08-12 18:58:43,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 18:58:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:58:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:58:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:58:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:58:43,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849129341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:58:43,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:58:43,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:58:43,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831323847] [2021-08-12 18:58:43,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:58:43,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:58:43,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:58:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:58:43,390 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:59:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:02,788 INFO L93 Difference]: Finished difference Result 24417 states and 87117 transitions. [2021-08-12 18:59:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 18:59:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 18:59:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:02,849 INFO L225 Difference]: With dead ends: 24417 [2021-08-12 18:59:02,849 INFO L226 Difference]: Without dead ends: 24300 [2021-08-12 18:59:02,854 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 18:59:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-08-12 18:59:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-08-12 18:59:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-08-12 18:59:05,523 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-08-12 18:59:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:05,523 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-08-12 18:59:05,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 18:59:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-08-12 18:59:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:59:05,542 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:05,542 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:05,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:05,757 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-08-12 18:59:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698352992] [2021-08-12 18:59:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:05,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:05,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698352992] [2021-08-12 18:59:05,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698352992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:05,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145273772] [2021-08-12 18:59:05,814 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 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 [2021-08-12 18:59:05,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 18:59:05,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:59:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:05,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145273772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:05,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:05,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 18:59:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729672781] [2021-08-12 18:59:05,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:59:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:59:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:59:05,953 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:59:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:14,644 INFO L93 Difference]: Finished difference Result 12286 states and 45188 transitions. [2021-08-12 18:59:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 18:59:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 18:59:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:14,678 INFO L225 Difference]: With dead ends: 12286 [2021-08-12 18:59:14,678 INFO L226 Difference]: Without dead ends: 12241 [2021-08-12 18:59:14,680 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 18:59:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-08-12 18:59:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-08-12 18:59:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-08-12 18:59:17,130 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-08-12 18:59:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:17,130 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-08-12 18:59:17,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 18:59:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-08-12 18:59:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:59:17,147 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:17,147 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:17,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-12 18:59:17,363 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-08-12 18:59:17,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:17,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688255720] [2021-08-12 18:59:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:17,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688255720] [2021-08-12 18:59:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688255720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605494768] [2021-08-12 18:59:17,399 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 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 [2021-08-12 18:59:17,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 18:59:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:59:17,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:17,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605494768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:17,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:17,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:59:17,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389407826] [2021-08-12 18:59:17,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:59:17,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:59:17,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:59:17,543 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:59:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:26,758 INFO L93 Difference]: Finished difference Result 12481 states and 45694 transitions. [2021-08-12 18:59:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 18:59:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:59:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:26,790 INFO L225 Difference]: With dead ends: 12481 [2021-08-12 18:59:26,790 INFO L226 Difference]: Without dead ends: 12408 [2021-08-12 18:59:26,792 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 18:59:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-08-12 18:59:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-08-12 18:59:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-08-12 18:59:29,247 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-08-12 18:59:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:29,247 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-08-12 18:59:29,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:59:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-08-12 18:59:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:59:29,265 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:29,265 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:29,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:29,481 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-08-12 18:59:29,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:29,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962478217] [2021-08-12 18:59:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:29,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962478217] [2021-08-12 18:59:29,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962478217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:29,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428789750] [2021-08-12 18:59:29,519 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 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 [2021-08-12 18:59:29,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 18:59:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:59:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428789750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:29,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:29,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-12 18:59:29,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049967017] [2021-08-12 18:59:29,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 18:59:29,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 18:59:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 18:59:29,666 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 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) [2021-08-12 18:59:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:40,991 INFO L93 Difference]: Finished difference Result 15389 states and 55982 transitions. [2021-08-12 18:59:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 18:59:40,992 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 25 [2021-08-12 18:59:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:41,029 INFO L225 Difference]: With dead ends: 15389 [2021-08-12 18:59:41,029 INFO L226 Difference]: Without dead ends: 15307 [2021-08-12 18:59:41,032 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-08-12 18:59:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-08-12 18:59:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-08-12 18:59:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-08-12 18:59:43,623 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-08-12 18:59:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:43,623 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-08-12 18:59:43,623 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) [2021-08-12 18:59:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-08-12 18:59:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:59:43,641 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:43,641 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:43,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:43,857 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-08-12 18:59:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:43,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817797372] [2021-08-12 18:59:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:43,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817797372] [2021-08-12 18:59:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817797372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:43,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337738256] [2021-08-12 18:59:43,903 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 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 [2021-08-12 18:59:43,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 18:59:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 18:59:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 18:59:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337738256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 18:59:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735970889] [2021-08-12 18:59:44,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 18:59:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 18:59:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 18:59:44,042 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:59:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:59:52,758 INFO L93 Difference]: Finished difference Result 12386 states and 45504 transitions. [2021-08-12 18:59:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 18:59:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 18:59:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:59:52,792 INFO L225 Difference]: With dead ends: 12386 [2021-08-12 18:59:52,792 INFO L226 Difference]: Without dead ends: 12316 [2021-08-12 18:59:52,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 18:59:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-08-12 18:59:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-08-12 18:59:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:59:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-08-12 18:59:55,396 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-08-12 18:59:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:59:55,397 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-08-12 18:59:55,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 18:59:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-08-12 18:59:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 18:59:55,414 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:59:55,414 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:59:55,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 18:59:55,630 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:59:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:59:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-08-12 18:59:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:59:55,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148668227] [2021-08-12 18:59:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:59:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:55,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:59:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148668227] [2021-08-12 18:59:55,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148668227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078242908] [2021-08-12 18:59:55,669 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 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 [2021-08-12 18:59:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:59:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 18:59:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 18:59:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:59:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078242908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 18:59:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 18:59:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 18:59:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348312320] [2021-08-12 18:59:55,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 18:59:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:59:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 18:59:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 18:59:55,794 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:00:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:07,039 INFO L93 Difference]: Finished difference Result 14479 states and 52890 transitions. [2021-08-12 19:00:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:00:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 19:00:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:07,090 INFO L225 Difference]: With dead ends: 14479 [2021-08-12 19:00:07,090 INFO L226 Difference]: Without dead ends: 14427 [2021-08-12 19:00:07,096 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:00:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-08-12 19:00:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-08-12 19:00:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-08-12 19:00:09,980 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-08-12 19:00:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:09,981 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-08-12 19:00:09,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:00:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-08-12 19:00:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:00:10,000 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:10,000 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:10,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:10,219 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-08-12 19:00:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:10,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972286369] [2021-08-12 19:00:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:10,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972286369] [2021-08-12 19:00:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972286369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:10,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991146494] [2021-08-12 19:00:10,253 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 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 [2021-08-12 19:00:10,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:00:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:00:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:10,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991146494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:10,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:10,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:00:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21523320] [2021-08-12 19:00:10,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:00:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:00:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:00:10,381 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:00:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:28,739 INFO L93 Difference]: Finished difference Result 18995 states and 66713 transitions. [2021-08-12 19:00:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:00:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 19:00:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:28,791 INFO L225 Difference]: With dead ends: 18995 [2021-08-12 19:00:28,791 INFO L226 Difference]: Without dead ends: 18922 [2021-08-12 19:00:28,796 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:00:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-08-12 19:00:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-08-12 19:00:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-08-12 19:00:31,706 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-08-12 19:00:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:31,706 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-08-12 19:00:31,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:00:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-08-12 19:00:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:00:31,725 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:31,725 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:31,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-12 19:00:31,941 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-08-12 19:00:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65970821] [2021-08-12 19:00:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:32,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65970821] [2021-08-12 19:00:32,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65970821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:32,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054081445] [2021-08-12 19:00:32,010 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:00:32,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:00:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:00:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:32,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054081445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:32,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:32,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:00:32,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853848815] [2021-08-12 19:00:32,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:00:32,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:00:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:00:32,243 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:00:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:43,956 INFO L93 Difference]: Finished difference Result 13364 states and 48261 transitions. [2021-08-12 19:00:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-12 19:00:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-08-12 19:00:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:44,005 INFO L225 Difference]: With dead ends: 13364 [2021-08-12 19:00:44,005 INFO L226 Difference]: Without dead ends: 13300 [2021-08-12 19:00:44,007 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 19:00:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-08-12 19:00:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-08-12 19:00:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:00:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-08-12 19:00:46,710 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-08-12 19:00:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:00:46,711 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-08-12 19:00:46,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:00:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-08-12 19:00:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:00:46,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:00:46,731 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:00:46,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:00:46,947 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:00:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:00:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-08-12 19:00:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:00:46,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116689055] [2021-08-12 19:00:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:00:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:00:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:00:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116689055] [2021-08-12 19:00:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116689055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411911430] [2021-08-12 19:00:46,975 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 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 [2021-08-12 19:00:47,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:00:47,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:00:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:00:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:00:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:00:47,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411911430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:00:47,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:00:47,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-12 19:00:47,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168233020] [2021-08-12 19:00:47,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:00:47,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:00:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:00:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:00:47,109 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 19:00:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:00:57,583 INFO L93 Difference]: Finished difference Result 12992 states and 47322 transitions. [2021-08-12 19:00:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:00:57,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-12 19:00:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:00:57,619 INFO L225 Difference]: With dead ends: 12992 [2021-08-12 19:00:57,619 INFO L226 Difference]: Without dead ends: 12926 [2021-08-12 19:00:57,622 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:00:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-08-12 19:01:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-08-12 19:01:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-08-12 19:01:00,272 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-08-12 19:01:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:00,272 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-08-12 19:01:00,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-12 19:01:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-08-12 19:01:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:00,291 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:00,291 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:00,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-12 19:01:00,505 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-08-12 19:01:00,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:00,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155585064] [2021-08-12 19:01:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155585064] [2021-08-12 19:01:00,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155585064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201787988] [2021-08-12 19:01:00,552 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 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 [2021-08-12 19:01:00,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:01:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201787988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:00,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:00,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:01:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997893912] [2021-08-12 19:01:00,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:00,737 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 19:01:11,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:11,653 INFO L93 Difference]: Finished difference Result 13196 states and 47868 transitions. [2021-08-12 19:01:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:01:11,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-08-12 19:01:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:11,693 INFO L225 Difference]: With dead ends: 13196 [2021-08-12 19:01:11,694 INFO L226 Difference]: Without dead ends: 13088 [2021-08-12 19:01:11,697 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 556.9ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:01:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-08-12 19:01:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-08-12 19:01:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-08-12 19:01:14,284 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-08-12 19:01:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:14,284 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-08-12 19:01:14,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-12 19:01:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-08-12 19:01:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:14,302 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:14,302 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 19:01:14,519 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-08-12 19:01:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227862723] [2021-08-12 19:01:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:14,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227862723] [2021-08-12 19:01:14,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227862723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367431931] [2021-08-12 19:01:14,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:01:14,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:01:14,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:01:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:14,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367431931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:14,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:14,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-12 19:01:14,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965959085] [2021-08-12 19:01:14,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:01:14,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:14,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:01:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:01:14,680 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:01:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:36,986 INFO L93 Difference]: Finished difference Result 25533 states and 90955 transitions. [2021-08-12 19:01:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:01:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-08-12 19:01:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:37,060 INFO L225 Difference]: With dead ends: 25533 [2021-08-12 19:01:37,061 INFO L226 Difference]: Without dead ends: 25450 [2021-08-12 19:01:37,068 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:01:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-08-12 19:01:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-08-12 19:01:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-08-12 19:01:40,256 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-08-12 19:01:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:40,257 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-08-12 19:01:40,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-08-12 19:01:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-08-12 19:01:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:40,287 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:40,287 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:40,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 19:01:40,501 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-08-12 19:01:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:40,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660409607] [2021-08-12 19:01:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:40,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660409607] [2021-08-12 19:01:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660409607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131554083] [2021-08-12 19:01:40,555 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 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 [2021-08-12 19:01:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:40,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:40,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131554083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:40,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:40,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:01:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365876299] [2021-08-12 19:01:40,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:40,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:40,689 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:01:41,767 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-08-12 19:01:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:01:54,128 INFO L93 Difference]: Finished difference Result 16150 states and 59036 transitions. [2021-08-12 19:01:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:01:54,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-08-12 19:01:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:01:54,170 INFO L225 Difference]: With dead ends: 16150 [2021-08-12 19:01:54,170 INFO L226 Difference]: Without dead ends: 16097 [2021-08-12 19:01:54,173 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 865.1ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 19:01:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-08-12 19:01:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-08-12 19:01:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:01:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-08-12 19:01:57,448 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-08-12 19:01:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:01:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-08-12 19:01:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:01:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-08-12 19:01:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:01:57,472 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:01:57,472 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:01:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-12 19:01:57,689 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:01:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:01:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-08-12 19:01:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:01:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800524538] [2021-08-12 19:01:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:01:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:01:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:57,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:01:57,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800524538] [2021-08-12 19:01:57,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800524538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398823626] [2021-08-12 19:01:57,727 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 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 [2021-08-12 19:01:57,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:01:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:01:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:01:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:01:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:01:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398823626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:01:57,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:01:57,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:01:57,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260259006] [2021-08-12 19:01:57,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:01:57,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:01:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:01:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:01:57,935 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:02:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:02:12,627 INFO L93 Difference]: Finished difference Result 16697 states and 60424 transitions. [2021-08-12 19:02:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 19:02:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-08-12 19:02:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:02:12,678 INFO L225 Difference]: With dead ends: 16697 [2021-08-12 19:02:12,678 INFO L226 Difference]: Without dead ends: 16644 [2021-08-12 19:02:12,682 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1033.8ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-08-12 19:02:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-08-12 19:02:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-08-12 19:02:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:02:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-08-12 19:02:15,931 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-08-12 19:02:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:02:15,931 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-08-12 19:02:15,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-08-12 19:02:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-08-12 19:02:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:02:15,955 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:02:15,955 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:02:16,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:16,171 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:02:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:02:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-08-12 19:02:16,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:02:16,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923249172] [2021-08-12 19:02:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:02:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:02:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:16,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:02:16,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923249172] [2021-08-12 19:02:16,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923249172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:16,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689379143] [2021-08-12 19:02:16,214 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 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 [2021-08-12 19:02:16,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:02:16,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:02:16,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:02:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:02:16,526 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-08-12 19:02:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:02:16,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689379143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:02:16,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:02:16,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:02:16,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122708322] [2021-08-12 19:02:16,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:02:16,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:02:16,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:02:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:02:16,569 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) Received shutdown request... [2021-08-12 19:02:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:02:19,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:02:19,412 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:02:19,415 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:02:19,416 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:02:19,416 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:02:19 BasicIcfg [2021-08-12 19:02:19,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:02:19,417 INFO L168 Benchmark]: Toolchain (without parser) took 596198.13 ms. Allocated memory was 127.9 MB in the beginning and 2.9 GB in the end (delta: 2.8 GB). Free memory was 107.6 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 127.9 MB. Free memory was 108.7 MB in the beginning and 108.6 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.05 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 106.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 INFO L168 Benchmark]: Boogie Preprocessor took 10.66 ms. Allocated memory is still 127.9 MB. Free memory was 106.0 MB in the beginning and 105.1 MB in the end (delta: 970.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 INFO L168 Benchmark]: RCFGBuilder took 219.81 ms. Allocated memory is still 127.9 MB. Free memory was 105.0 MB in the beginning and 92.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 INFO L168 Benchmark]: TraceAbstraction took 595939.84 ms. Allocated memory was 165.7 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 150.2 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-12 19:02:19,417 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 0.14 ms. Allocated memory is still 127.9 MB. Free memory was 108.7 MB in the beginning and 108.6 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.05 ms. Allocated memory is still 127.9 MB. Free memory was 107.5 MB in the beginning and 106.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.66 ms. Allocated memory is still 127.9 MB. Free memory was 106.0 MB in the beginning and 105.1 MB in the end (delta: 970.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 219.81 ms. Allocated memory is still 127.9 MB. Free memory was 105.0 MB in the beginning and 92.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 595939.84 ms. Allocated memory was 165.7 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 150.2 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (14353states) and FLOYD_HOARE automaton (currently 42 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (2320 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 595875.6ms, OverallIterations: 106, TraceHistogramMax: 3, EmptinessCheckTime: 738.1ms, AutomataDifference: 472594.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3538 SDtfs, 24190 SDslu, 25413 SDs, 0 SdLazy, 35541 SolverSat, 4574 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16537.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5287 GetRequests, 1744 SyntacticMatches, 2 SemanticMatches, 3541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51679 ImplicationChecksByTransitivity, 43456.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14353occurred in iteration=105, InterpolantAutomatonStates: 3187, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84091.5ms AutomataMinimizationTime, 105 MinimizatonAttempts, 200961 StatesRemovedByMinimization, 105 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 343.9ms SsaConstructionTime, 1098.0ms SatisfiabilityAnalysisTime, 12605.9ms InterpolantComputationTime, 4578 NumberOfCodeBlocks, 4576 NumberOfCodeBlocksAsserted, 325 NumberOfCheckSat, 4374 ConstructedInterpolants, 0 QuantifiedInterpolants, 31455 SizeOfPredicates, 548 NumberOfNonLiveVariables, 6677 ConjunctsInSsa, 941 ConjunctsInUnsatCore, 204 InterpolantComputations, 8 PerfectInterpolantSequences, 580/1503 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