/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:56:41,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:56:41,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:56:41,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 13:56:41,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 13:56:41,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 13:56:41,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 13:56:41,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 13:56:41,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 13:56:41,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 13:56:41,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 13:56:41,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 13:56:41,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 13:56:41,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 13:56:41,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 13:56:41,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 13:56:41,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 13:56:41,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 13:56:41,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 13:56:41,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 13:56:41,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 13:56:41,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 13:56:41,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 13:56:41,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 13:56:41,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 13:56:41,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 13:56:41,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 13:56:41,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 13:56:41,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 13:56:41,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 13:56:41,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 13:56:41,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 13:56:41,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 13:56:41,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 13:56:41,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 13:56:41,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 13:56:41,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 13:56:41,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 13:56:41,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:56:41,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:56:41,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:56:41,180 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-Separate.epf [2021-06-05 13:56:41,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:56:41,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:56:41,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:56:41,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:56:41,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:56:41,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:56:41,210 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:56:41,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:56:41,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:56:41,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:56:41,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:56:41,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:56:41,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:56:41,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:56:41,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:56:41,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:56:41,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:56:41,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:56:41,465 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:56:41,469 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:56:41,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-06-05 13:56:41,470 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-06-05 13:56:41,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:56:41,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:56:41,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:56:41,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:56:41,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:56:41,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:56:41,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:56:41,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:56:41,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:56:41,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... [2021-06-05 13:56:41,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:56:41,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:56:41,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:56:41,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:56:41,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:56:41,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:56:41,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:56:41,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:56:41,598 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:56:41,598 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:56:41,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:56:41,598 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:56:41,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:56:41,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:56:41,599 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:56:41,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:56:41,797 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:56:41,797 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:56:41,797 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 13:56:41,798 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:56:41 BoogieIcfgContainer [2021-06-05 13:56:41,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:56:41,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:56:41,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:56:41,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:56:41,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:56:41" (1/2) ... [2021-06-05 13:56:41,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ffa82d and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:56:41, skipping insertion in model container [2021-06-05 13:56:41,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:56:41" (2/2) ... [2021-06-05 13:56:41,803 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-06-05 13:56:41,807 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:56:41,807 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:56:41,807 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:56:41,808 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:56:41,838 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:56:41,852 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:56:41,881 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:56:41,882 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:56:41,882 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:56:41,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:56:41,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:56:41,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:56:41,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:56:41,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:56:41,888 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 13:56:41,894 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:56:41,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:41,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:41,899 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-06-05 13:56:41,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:41,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521082501] [2021-06-05 13:56:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521082501] [2021-06-05 13:56:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521082501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:56:42,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:56:42,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:56:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144509473] [2021-06-05 13:56:42,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:56:42,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:56:42,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:56:42,020 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,040 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 13:56:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:56:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:56:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,051 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:56:42,051 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 13:56:42,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:56:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 13:56:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 13:56:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-06-05 13:56:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 13:56:42,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 13:56:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,077 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 13:56:42,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 13:56:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:56:42,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:56:42,079 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-06-05 13:56:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143579350] [2021-06-05 13:56:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143579350] [2021-06-05 13:56:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143579350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561259175] [2021-06-05 13:56:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 13:56:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561259175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:42,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 13:56:42,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312999514] [2021-06-05 13:56:42,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:56:42,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:56:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:56:42,234 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,261 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 13:56:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:56:42,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:56:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,262 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:56:42,262 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:56:42,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:56:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:56:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 13:56:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 13:56:42,266 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 13:56:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,266 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 13:56:42,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 13:56:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:56:42,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,267 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:56:42,480 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-06-05 13:56:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126644906] [2021-06-05 13:56:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126644906] [2021-06-05 13:56:42,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126644906] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:56:42,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:56:42,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:56:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748729342] [2021-06-05 13:56:42,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:56:42,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:56:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:56:42,510 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,541 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 13:56:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:56:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:56:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,546 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:56:42,546 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:56:42,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:56:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:56:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:56:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-06-05 13:56:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 13:56:42,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 13:56:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,553 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 13:56:42,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 13:56:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:56:42,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,554 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:56:42,554 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-06-05 13:56:42,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588344024] [2021-06-05 13:56:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588344024] [2021-06-05 13:56:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588344024] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:56:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:56:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:56:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925253488] [2021-06-05 13:56:42,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:56:42,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:56:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:56:42,610 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,626 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 13:56:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:56:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:56:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,628 INFO L225 Difference]: With dead ends: 20 [2021-06-05 13:56:42,628 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 13:56:42,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:56:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 13:56:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 13:56:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:56:42,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:56:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,634 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:56:42,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:56:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:56:42,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:56:42,635 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-06-05 13:56:42,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409169476] [2021-06-05 13:56:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:42,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409169476] [2021-06-05 13:56:42,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409169476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294473157] [2021-06-05 13:56:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:56:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294473157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:42,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 13:56:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659026909] [2021-06-05 13:56:42,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:56:42,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:56:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:56:42,726 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,740 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 13:56:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:56:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:56:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,741 INFO L225 Difference]: With dead ends: 24 [2021-06-05 13:56:42,741 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 13:56:42,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:56:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 13:56:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 13:56:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 13:56:42,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 13:56:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,743 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 13:56:42,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 13:56:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:56:42,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,744 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:42,953 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-06-05 13:56:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362950008] [2021-06-05 13:56:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:42,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362950008] [2021-06-05 13:56:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362950008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081459840] [2021-06-05 13:56:42,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:43,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:43,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:56:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:43,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081459840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:43,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:56:43,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540668088] [2021-06-05 13:56:43,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:56:43,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:56:43,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:56:43,076 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:43,096 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 13:56:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:56:43,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:56:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:43,097 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:56:43,097 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:56:43,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:56:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:56:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 13:56:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 13:56:43,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 13:56:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:43,100 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 13:56:43,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 13:56:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:56:43,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:43,100 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:43,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:43,319 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-06-05 13:56:43,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:43,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337129039] [2021-06-05 13:56:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:43,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:43,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337129039] [2021-06-05 13:56:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337129039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351823765] [2021-06-05 13:56:43,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:43,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:56:43,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:56:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:43,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351823765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:43,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:56:43,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882031285] [2021-06-05 13:56:43,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:43,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:43,486 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-06-05 13:56:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:43,523 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-05 13:56:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:56:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 13 [2021-06-05 13:56:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:43,526 INFO L225 Difference]: With dead ends: 32 [2021-06-05 13:56:43,526 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 13:56:43,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 13:56:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-05 13:56:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-05 13:56:43,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-05 13:56:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:43,533 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-05 13:56:43,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-06-05 13:56:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-05 13:56:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:56:43,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:43,536 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:43,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:43,752 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:43,753 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-06-05 13:56:43,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:43,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663424767] [2021-06-05 13:56:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663424767] [2021-06-05 13:56:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663424767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86526171] [2021-06-05 13:56:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:43,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:56:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:43,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:43,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:56:44,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:44,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:44,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:44,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:56:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:44,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86526171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:44,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 13:56:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956037873] [2021-06-05 13:56:44,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:44,024 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:44,097 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-06-05 13:56:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:56:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:44,098 INFO L225 Difference]: With dead ends: 80 [2021-06-05 13:56:44,098 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 13:56:44,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 13:56:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-06-05 13:56:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-06-05 13:56:44,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-06-05 13:56:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:44,102 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-06-05 13:56:44,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-06-05 13:56:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:56:44,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:44,102 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:44,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:44,318 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-06-05 13:56:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:44,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445066552] [2021-06-05 13:56:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:44,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:44,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445066552] [2021-06-05 13:56:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445066552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046007909] [2021-06-05 13:56:44,402 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:44,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:56:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:56:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:44,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:56:44,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:44,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:44,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:44,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:56:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:44,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046007909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:44,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 13:56:44,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959702838] [2021-06-05 13:56:44,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:44,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:44,721 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:44,797 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-06-05 13:56:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:56:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:44,798 INFO L225 Difference]: With dead ends: 89 [2021-06-05 13:56:44,798 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 13:56:44,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 13:56:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-06-05 13:56:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-06-05 13:56:44,801 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-06-05 13:56:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:44,802 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-06-05 13:56:44,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-06-05 13:56:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:56:44,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:44,803 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:45,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:45,004 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-06-05 13:56:45,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:45,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798327107] [2021-06-05 13:56:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:45,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:45,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798327107] [2021-06-05 13:56:45,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798327107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7842972] [2021-06-05 13:56:45,070 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:45,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:56:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:56:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:45,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:56:45,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:45,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:45,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:45,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:56:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:45,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7842972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:45,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 13:56:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745782642] [2021-06-05 13:56:45,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:45,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:45,268 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:45,332 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-06-05 13:56:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:56:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:45,333 INFO L225 Difference]: With dead ends: 98 [2021-06-05 13:56:45,334 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 13:56:45,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 13:56:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-06-05 13:56:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-06-05 13:56:45,338 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-06-05 13:56:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:45,338 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-06-05 13:56:45,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-06-05 13:56:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:56:45,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:45,355 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:45,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:56:45,574 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-06-05 13:56:45,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:45,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028704470] [2021-06-05 13:56:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:45,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:45,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028704470] [2021-06-05 13:56:45,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028704470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554082881] [2021-06-05 13:56:45,639 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:56:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:45,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:56:45,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:45,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:45,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:45,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:56:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:45,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554082881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:45,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 13:56:45,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428545393] [2021-06-05 13:56:45,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:45,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:45,881 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:45,993 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 13:56:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:45,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:56:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:45,994 INFO L225 Difference]: With dead ends: 108 [2021-06-05 13:56:45,994 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 13:56:45,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 13:56:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-06-05 13:56:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-06-05 13:56:46,010 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-06-05 13:56:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:46,010 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-06-05 13:56:46,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-06-05 13:56:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:56:46,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:46,011 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:46,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 13:56:46,227 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-06-05 13:56:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:46,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621556844] [2021-06-05 13:56:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:46,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621556844] [2021-06-05 13:56:46,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621556844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146615620] [2021-06-05 13:56:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:46,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:56:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:46,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:46,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:56:46,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:46,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:46,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:46,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:56:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:46,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146615620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:46,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 13:56:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261347237] [2021-06-05 13:56:46,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:46,528 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:46,585 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-06-05 13:56:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:56:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:46,586 INFO L225 Difference]: With dead ends: 119 [2021-06-05 13:56:46,586 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 13:56:46,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 13:56:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-06-05 13:56:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-06-05 13:56:46,591 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-06-05 13:56:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:46,591 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-06-05 13:56:46,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-06-05 13:56:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:46,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:46,592 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:46,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:56:46,808 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-06-05 13:56:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:46,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348748822] [2021-06-05 13:56:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:46,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348748822] [2021-06-05 13:56:46,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348748822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113002863] [2021-06-05 13:56:46,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:56:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113002863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086494322] [2021-06-05 13:56:47,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:47,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:47,020 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:47,102 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-06-05 13:56:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:47,104 INFO L225 Difference]: With dead ends: 141 [2021-06-05 13:56:47,104 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 13:56:47,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 13:56:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-06-05 13:56:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-06-05 13:56:47,118 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-06-05 13:56:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,118 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-06-05 13:56:47,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-06-05 13:56:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:47,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:47,121 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:47,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:47,327 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-06-05 13:56:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52444536] [2021-06-05 13:56:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:47,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52444536] [2021-06-05 13:56:47,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52444536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326123564] [2021-06-05 13:56:47,373 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:56:47,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:47,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326123564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:47,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866188] [2021-06-05 13:56:47,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:47,450 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:47,560 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-06-05 13:56:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:47,569 INFO L225 Difference]: With dead ends: 161 [2021-06-05 13:56:47,569 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:56:47,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:56:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-06-05 13:56:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-06-05 13:56:47,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-06-05 13:56:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,572 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-06-05 13:56:47,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-06-05 13:56:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:47,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:47,573 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:47,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 13:56:47,781 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-06-05 13:56:47,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:47,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733898766] [2021-06-05 13:56:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733898766] [2021-06-05 13:56:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733898766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729660756] [2021-06-05 13:56:47,833 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:47,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:47,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:47,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729660756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:47,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216134469] [2021-06-05 13:56:47,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:47,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:47,892 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:47,962 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-06-05 13:56:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:47,963 INFO L225 Difference]: With dead ends: 121 [2021-06-05 13:56:47,963 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:56:47,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:56:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-06-05 13:56:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-06-05 13:56:47,966 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-06-05 13:56:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,966 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-06-05 13:56:47,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-06-05 13:56:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:47,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:47,967 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:48,181 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-06-05 13:56:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696269340] [2021-06-05 13:56:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:48,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696269340] [2021-06-05 13:56:48,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696269340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956464815] [2021-06-05 13:56:48,219 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 [2021-06-05 13:56:48,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:56:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:48,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956464815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:48,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:48,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126236934] [2021-06-05 13:56:48,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:48,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:48,271 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:48,305 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-06-05 13:56:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:48,307 INFO L225 Difference]: With dead ends: 166 [2021-06-05 13:56:48,307 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:56:48,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:56:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-06-05 13:56:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-06-05 13:56:48,310 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-06-05 13:56:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:48,310 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-06-05 13:56:48,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-06-05 13:56:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:48,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,310 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 13:56:48,517 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-06-05 13:56:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566724639] [2021-06-05 13:56:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:48,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566724639] [2021-06-05 13:56:48,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566724639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953952246] [2021-06-05 13:56:48,552 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 [2021-06-05 13:56:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:48,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953952246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:48,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:48,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764131110] [2021-06-05 13:56:48,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:48,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:48,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:48,603 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:48,656 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-06-05 13:56:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:56:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:48,658 INFO L225 Difference]: With dead ends: 169 [2021-06-05 13:56:48,658 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 13:56:48,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 13:56:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-06-05 13:56:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-06-05 13:56:48,663 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-06-05 13:56:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:48,664 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-06-05 13:56:48,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-06-05 13:56:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:48,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,664 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:48,873 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-06-05 13:56:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805054237] [2021-06-05 13:56:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:48,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805054237] [2021-06-05 13:56:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805054237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870009872] [2021-06-05 13:56:48,910 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 [2021-06-05 13:56:48,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:48,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:48,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:48,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870009872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:48,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924947498] [2021-06-05 13:56:48,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:48,966 INFO L87 Difference]: Start difference. First operand 104 states and 279 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:49,036 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-06-05 13:56:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:49,037 INFO L225 Difference]: With dead ends: 177 [2021-06-05 13:56:49,037 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 13:56:49,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 13:56:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-06-05 13:56:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-06-05 13:56:49,040 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-06-05 13:56:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:49,040 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-06-05 13:56:49,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-06-05 13:56:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:49,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:49,041 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:49,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 13:56:49,253 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-06-05 13:56:49,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:49,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535502282] [2021-06-05 13:56:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535502282] [2021-06-05 13:56:49,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535502282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270430799] [2021-06-05 13:56:49,290 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 [2021-06-05 13:56:49,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:49,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:49,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270430799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:49,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:49,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286741698] [2021-06-05 13:56:49,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:49,351 INFO L87 Difference]: Start difference. First operand 110 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:49,429 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-06-05 13:56:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:49,430 INFO L225 Difference]: With dead ends: 167 [2021-06-05 13:56:49,430 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:56:49,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:56:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-06-05 13:56:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-06-05 13:56:49,433 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-06-05 13:56:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:49,434 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-06-05 13:56:49,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-06-05 13:56:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:49,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:49,434 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:49,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:49,645 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-06-05 13:56:49,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:49,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087225047] [2021-06-05 13:56:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:49,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087225047] [2021-06-05 13:56:49,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087225047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559939429] [2021-06-05 13:56:49,692 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 [2021-06-05 13:56:49,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:49,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559939429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:49,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:49,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98711265] [2021-06-05 13:56:49,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:49,757 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:49,795 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-06-05 13:56:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:49,796 INFO L225 Difference]: With dead ends: 181 [2021-06-05 13:56:49,796 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 13:56:49,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 13:56:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-06-05 13:56:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-06-05 13:56:49,798 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-06-05 13:56:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-06-05 13:56:49,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-06-05 13:56:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:49,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:49,799 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:50,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 13:56:50,015 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-06-05 13:56:50,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:50,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252941492] [2021-06-05 13:56:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252941492] [2021-06-05 13:56:50,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252941492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116183264] [2021-06-05 13:56:50,048 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 [2021-06-05 13:56:50,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:50,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116183264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:50,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489777076] [2021-06-05 13:56:50,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:50,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:50,113 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:50,193 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-06-05 13:56:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:50,194 INFO L225 Difference]: With dead ends: 148 [2021-06-05 13:56:50,194 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 13:56:50,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 13:56:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-06-05 13:56:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-06-05 13:56:50,197 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-06-05 13:56:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:50,197 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-06-05 13:56:50,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-06-05 13:56:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:50,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:50,197 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:50,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 13:56:50,418 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:50,418 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-06-05 13:56:50,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:50,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752385951] [2021-06-05 13:56:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752385951] [2021-06-05 13:56:50,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752385951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465435023] [2021-06-05 13:56:50,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:50,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465435023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465354351] [2021-06-05 13:56:50,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:50,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:50,528 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:50,583 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-06-05 13:56:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:50,584 INFO L225 Difference]: With dead ends: 194 [2021-06-05 13:56:50,584 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 13:56:50,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 13:56:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-06-05 13:56:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-06-05 13:56:50,587 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-06-05 13:56:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:50,587 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-06-05 13:56:50,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-06-05 13:56:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:50,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:50,588 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:50,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:56:50,801 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-06-05 13:56:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:50,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262845776] [2021-06-05 13:56:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:50,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262845776] [2021-06-05 13:56:50,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262845776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085223673] [2021-06-05 13:56:50,835 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 [2021-06-05 13:56:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:50,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:50,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085223673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:50,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54052202] [2021-06-05 13:56:50,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:50,907 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:50,950 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-06-05 13:56:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:56:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:50,951 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:56:50,951 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 13:56:50,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:56:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 13:56:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-06-05 13:56:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-06-05 13:56:50,954 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-06-05 13:56:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:50,954 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-06-05 13:56:50,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-06-05 13:56:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:50,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:50,954 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:51,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 13:56:51,155 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-06-05 13:56:51,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:51,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124620861] [2021-06-05 13:56:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:51,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124620861] [2021-06-05 13:56:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124620861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937384387] [2021-06-05 13:56:51,217 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 [2021-06-05 13:56:51,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:51,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937384387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:51,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245465226] [2021-06-05 13:56:51,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:51,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:51,278 INFO L87 Difference]: Start difference. First operand 116 states and 317 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:51,346 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-06-05 13:56:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:51,347 INFO L225 Difference]: With dead ends: 190 [2021-06-05 13:56:51,347 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 13:56:51,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 13:56:51,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-06-05 13:56:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-06-05 13:56:51,350 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-06-05 13:56:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:51,350 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-06-05 13:56:51,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-06-05 13:56:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:51,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:51,351 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:51,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:51,565 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-06-05 13:56:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:51,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694039508] [2021-06-05 13:56:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:51,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694039508] [2021-06-05 13:56:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694039508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113681496] [2021-06-05 13:56:51,599 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 [2021-06-05 13:56:51,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:51,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:51,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113681496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:51,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523296887] [2021-06-05 13:56:51,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:51,655 INFO L87 Difference]: Start difference. First operand 124 states and 345 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:51,731 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-06-05 13:56:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:51,732 INFO L225 Difference]: With dead ends: 188 [2021-06-05 13:56:51,732 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 13:56:51,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 13:56:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-06-05 13:56:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-06-05 13:56:51,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-06-05 13:56:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:51,735 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-06-05 13:56:51,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-06-05 13:56:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:51,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:51,735 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:51,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:51,948 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-06-05 13:56:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:51,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885574136] [2021-06-05 13:56:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:51,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885574136] [2021-06-05 13:56:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885574136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222090720] [2021-06-05 13:56:51,979 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) [2021-06-05 13:56:52,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:52,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222090720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:52,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036040670] [2021-06-05 13:56:52,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:52,033 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:52,065 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-06-05 13:56:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:52,066 INFO L225 Difference]: With dead ends: 191 [2021-06-05 13:56:52,066 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 13:56:52,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 13:56:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-06-05 13:56:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-06-05 13:56:52,069 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-06-05 13:56:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:52,070 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-06-05 13:56:52,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-06-05 13:56:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:52,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:52,070 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:52,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 13:56:52,286 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-06-05 13:56:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:52,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241906493] [2021-06-05 13:56:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:52,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241906493] [2021-06-05 13:56:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241906493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267482476] [2021-06-05 13:56:52,316 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 [2021-06-05 13:56:52,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:52,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267482476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:52,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:52,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220396255] [2021-06-05 13:56:52,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:52,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:52,385 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:52,485 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-06-05 13:56:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:52,486 INFO L225 Difference]: With dead ends: 193 [2021-06-05 13:56:52,486 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 13:56:52,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 13:56:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-06-05 13:56:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-06-05 13:56:52,489 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-06-05 13:56:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:52,489 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-06-05 13:56:52,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-06-05 13:56:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:52,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:52,489 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:52,705 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-06-05 13:56:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432809268] [2021-06-05 13:56:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432809268] [2021-06-05 13:56:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432809268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648857842] [2021-06-05 13:56:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:52,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:52,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:52,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:52,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648857842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:52,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:52,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124190970] [2021-06-05 13:56:52,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:52,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:52,792 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:52,845 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-06-05 13:56:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:52,846 INFO L225 Difference]: With dead ends: 200 [2021-06-05 13:56:52,846 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 13:56:52,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 13:56:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-06-05 13:56:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-06-05 13:56:52,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-06-05 13:56:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:52,849 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-06-05 13:56:52,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-06-05 13:56:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:52,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:52,850 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:53,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 13:56:53,065 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-06-05 13:56:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:53,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540435056] [2021-06-05 13:56:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:53,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:53,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540435056] [2021-06-05 13:56:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540435056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509649835] [2021-06-05 13:56:53,102 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 [2021-06-05 13:56:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:53,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509649835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:53,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573734159] [2021-06-05 13:56:53,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:53,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:53,151 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:53,207 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-06-05 13:56:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:53,208 INFO L225 Difference]: With dead ends: 157 [2021-06-05 13:56:53,208 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 13:56:53,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 13:56:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-06-05 13:56:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-06-05 13:56:53,211 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-06-05 13:56:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:53,211 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-06-05 13:56:53,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-06-05 13:56:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:53,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:53,212 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:53,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:53,425 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-06-05 13:56:53,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:53,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986934750] [2021-06-05 13:56:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:53,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:53,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986934750] [2021-06-05 13:56:53,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986934750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566053915] [2021-06-05 13:56:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566053915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:53,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683014002] [2021-06-05 13:56:53,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:53,516 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:53,614 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-06-05 13:56:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:53,615 INFO L225 Difference]: With dead ends: 208 [2021-06-05 13:56:53,615 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 13:56:53,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 13:56:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-06-05 13:56:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-06-05 13:56:53,618 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-06-05 13:56:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:53,619 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-06-05 13:56:53,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-06-05 13:56:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:53,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:53,619 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:53,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 13:56:53,820 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:53,820 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-06-05 13:56:53,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:53,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383059987] [2021-06-05 13:56:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:53,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383059987] [2021-06-05 13:56:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383059987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457797091] [2021-06-05 13:56:53,853 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:53,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457797091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:53,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191824090] [2021-06-05 13:56:53,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:53,908 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:53,953 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-06-05 13:56:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:56:53,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:53,954 INFO L225 Difference]: With dead ends: 216 [2021-06-05 13:56:53,954 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:56:53,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:56:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-06-05 13:56:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-05 13:56:53,957 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-06-05 13:56:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:53,957 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-05 13:56:53,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-05 13:56:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:53,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:53,957 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,169 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-06-05 13:56:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037369301] [2021-06-05 13:56:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037369301] [2021-06-05 13:56:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037369301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966938102] [2021-06-05 13:56:54,199 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:54,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966938102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712097494] [2021-06-05 13:56:54,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:54,250 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:54,339 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-06-05 13:56:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:54,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:54,340 INFO L225 Difference]: With dead ends: 221 [2021-06-05 13:56:54,340 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 13:56:54,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 13:56:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-06-05 13:56:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 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) [2021-06-05 13:56:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-06-05 13:56:54,343 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-06-05 13:56:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:54,343 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-06-05 13:56:54,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-06-05 13:56:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:54,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:54,344 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:56:54,552 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-06-05 13:56:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848631316] [2021-06-05 13:56:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:54,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848631316] [2021-06-05 13:56:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848631316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394623028] [2021-06-05 13:56:54,588 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394623028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053022657] [2021-06-05 13:56:54,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:54,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:54,637 INFO L87 Difference]: Start difference. First operand 157 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:54,703 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-06-05 13:56:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:54,705 INFO L225 Difference]: With dead ends: 232 [2021-06-05 13:56:54,705 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 13:56:54,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 13:56:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-06-05 13:56:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-06-05 13:56:54,710 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-06-05 13:56:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:54,710 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-06-05 13:56:54,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-06-05 13:56:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:54,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:54,710 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,913 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-06-05 13:56:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617432702] [2021-06-05 13:56:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617432702] [2021-06-05 13:56:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617432702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987285785] [2021-06-05 13:56:54,949 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987285785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:54,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575170123] [2021-06-05 13:56:54,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:54,998 INFO L87 Difference]: Start difference. First operand 157 states and 453 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:55,031 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-06-05 13:56:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:55,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:55,032 INFO L225 Difference]: With dead ends: 220 [2021-06-05 13:56:55,032 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 13:56:55,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 13:56:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-06-05 13:56:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-06-05 13:56:55,036 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-06-05 13:56:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:55,036 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-06-05 13:56:55,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-06-05 13:56:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:55,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:55,036 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:55,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:55,252 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-06-05 13:56:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:55,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539023484] [2021-06-05 13:56:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:55,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:55,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539023484] [2021-06-05 13:56:55,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539023484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62760182] [2021-06-05 13:56:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:55,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62760182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:55,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632196093] [2021-06-05 13:56:55,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:55,340 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:55,430 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-06-05 13:56:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:55,431 INFO L225 Difference]: With dead ends: 236 [2021-06-05 13:56:55,431 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 13:56:55,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 13:56:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-06-05 13:56:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-06-05 13:56:55,434 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-06-05 13:56:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:55,434 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-06-05 13:56:55,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-06-05 13:56:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:55,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:55,435 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:55,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 13:56:55,635 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-06-05 13:56:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:55,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366727654] [2021-06-05 13:56:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:55,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366727654] [2021-06-05 13:56:55,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366727654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15200883] [2021-06-05 13:56:55,665 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:55,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:55,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:55,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15200883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:55,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894577875] [2021-06-05 13:56:55,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:55,721 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:55,776 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-06-05 13:56:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:55,777 INFO L225 Difference]: With dead ends: 225 [2021-06-05 13:56:55,778 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 13:56:55,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 13:56:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-06-05 13:56:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-06-05 13:56:55,781 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-06-05 13:56:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:55,781 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-06-05 13:56:55,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-06-05 13:56:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:55,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:55,781 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:55,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:55,993 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-06-05 13:56:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:55,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972030899] [2021-06-05 13:56:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972030899] [2021-06-05 13:56:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972030899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424610021] [2021-06-05 13:56:56,025 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:56,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:56:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424610021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:56,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562880758] [2021-06-05 13:56:56,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:56,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:56,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:56,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:56,078 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:56,134 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-06-05 13:56:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:56,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:56,135 INFO L225 Difference]: With dead ends: 210 [2021-06-05 13:56:56,135 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 13:56:56,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 13:56:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-06-05 13:56:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-06-05 13:56:56,139 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-06-05 13:56:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:56,139 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-06-05 13:56:56,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-06-05 13:56:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:56,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:56,139 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:56,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 13:56:56,353 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-06-05 13:56:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:56,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933364011] [2021-06-05 13:56:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933364011] [2021-06-05 13:56:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933364011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680921577] [2021-06-05 13:56:56,381 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:56,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:56,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:56,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680921577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:56,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861134989] [2021-06-05 13:56:56,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:56,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:56,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:56,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:56,437 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:56,498 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-06-05 13:56:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:56,499 INFO L225 Difference]: With dead ends: 201 [2021-06-05 13:56:56,499 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 13:56:56,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 13:56:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-06-05 13:56:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-06-05 13:56:56,502 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-06-05 13:56:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:56,502 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-06-05 13:56:56,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-06-05 13:56:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:56,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:56,503 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:56,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:56,719 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-06-05 13:56:56,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:56,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286891629] [2021-06-05 13:56:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:56,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286891629] [2021-06-05 13:56:56,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286891629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822227871] [2021-06-05 13:56:56,754 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:56,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:56,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822227871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:56,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143161118] [2021-06-05 13:56:56,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:56,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:56,817 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:56,877 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-06-05 13:56:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:56,878 INFO L225 Difference]: With dead ends: 199 [2021-06-05 13:56:56,878 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 13:56:56,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 13:56:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-06-05 13:56:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-06-05 13:56:56,881 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-06-05 13:56:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:56,881 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-06-05 13:56:56,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-06-05 13:56:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:56,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:56,882 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:57,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 13:56:57,097 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-06-05 13:56:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:57,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228980380] [2021-06-05 13:56:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228980380] [2021-06-05 13:56:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228980380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603271882] [2021-06-05 13:56:57,127 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:57,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:56:57,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:57,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603271882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:57,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:57,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993145282] [2021-06-05 13:56:57,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:57,183 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:57,292 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-06-05 13:56:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 13:56:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:57,294 INFO L225 Difference]: With dead ends: 212 [2021-06-05 13:56:57,294 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 13:56:57,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 13:56:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-06-05 13:56:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-06-05 13:56:57,297 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-06-05 13:56:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:57,297 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-06-05 13:56:57,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-06-05 13:56:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:57,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:57,297 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:57,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 13:56:57,513 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-06-05 13:56:57,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:57,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438990226] [2021-06-05 13:56:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:57,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438990226] [2021-06-05 13:56:57,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438990226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653338374] [2021-06-05 13:56:57,542 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653338374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:57,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:57,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589167747] [2021-06-05 13:56:57,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:57,591 INFO L87 Difference]: Start difference. First operand 162 states and 465 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:57,631 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-06-05 13:56:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:56:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:57,633 INFO L225 Difference]: With dead ends: 260 [2021-06-05 13:56:57,633 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 13:56:57,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 13:56:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-06-05 13:56:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-06-05 13:56:57,643 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-06-05 13:56:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:57,643 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-06-05 13:56:57,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-06-05 13:56:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:57,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:57,644 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:57,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:57,857 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-06-05 13:56:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:57,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319240259] [2021-06-05 13:56:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:57,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319240259] [2021-06-05 13:56:57,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319240259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855430952] [2021-06-05 13:56:57,892 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:57,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855430952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:57,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:57,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211090643] [2021-06-05 13:56:57,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:57,937 INFO L87 Difference]: Start difference. First operand 168 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:58,015 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-06-05 13:56:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:58,016 INFO L225 Difference]: With dead ends: 258 [2021-06-05 13:56:58,016 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 13:56:58,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 13:56:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-06-05 13:56:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-05 13:56:58,019 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-06-05 13:56:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:58,020 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-05 13:56:58,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-05 13:56:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:58,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:58,020 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:58,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:56:58,237 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-06-05 13:56:58,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:58,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041919637] [2021-06-05 13:56:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041919637] [2021-06-05 13:56:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041919637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409172237] [2021-06-05 13:56:58,284 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:58,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:58,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409172237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:58,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:58,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603919735] [2021-06-05 13:56:58,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:58,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:58,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:58,340 INFO L87 Difference]: Start difference. First operand 195 states and 577 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:58,414 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-06-05 13:56:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:58,415 INFO L225 Difference]: With dead ends: 275 [2021-06-05 13:56:58,415 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 13:56:58,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 13:56:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-06-05 13:56:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-06-05 13:56:58,419 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-06-05 13:56:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:58,419 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-06-05 13:56:58,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-06-05 13:56:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:58,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:58,420 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:58,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:58,636 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-06-05 13:56:58,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:58,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330632650] [2021-06-05 13:56:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:58,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:58,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330632650] [2021-06-05 13:56:58,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330632650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019474613] [2021-06-05 13:56:58,668 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:58,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:58,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:56:58,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019474613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:58,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:56:58,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661605362] [2021-06-05 13:56:58,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:56:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:56:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:56:58,732 INFO L87 Difference]: Start difference. First operand 195 states and 576 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:58,760 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-06-05 13:56:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:56:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:58,762 INFO L225 Difference]: With dead ends: 245 [2021-06-05 13:56:58,762 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 13:56:58,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 13:56:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-06-05 13:56:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-06-05 13:56:58,765 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-06-05 13:56:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:58,765 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-06-05 13:56:58,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-06-05 13:56:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:58,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:58,765 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:58,981 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-06-05 13:56:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586869896] [2021-06-05 13:56:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586869896] [2021-06-05 13:56:59,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586869896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009954191] [2021-06-05 13:56:59,007 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:56:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009954191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:59,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968570215] [2021-06-05 13:56:59,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:59,071 INFO L87 Difference]: Start difference. First operand 194 states and 570 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:59,153 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-06-05 13:56:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:59,155 INFO L225 Difference]: With dead ends: 279 [2021-06-05 13:56:59,155 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 13:56:59,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 13:56:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-06-05 13:56:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-06-05 13:56:59,158 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-06-05 13:56:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,158 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-06-05 13:56:59,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-06-05 13:56:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:59,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,158 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:59,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,377 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:59,377 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-06-05 13:56:59,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:59,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673921294] [2021-06-05 13:56:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:59,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673921294] [2021-06-05 13:56:59,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673921294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767995073] [2021-06-05 13:56:59,409 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:56:59,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767995073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:59,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:59,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169541987] [2021-06-05 13:56:59,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:59,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:59,465 INFO L87 Difference]: Start difference. First operand 194 states and 569 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:59,535 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-06-05 13:56:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:56:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:59,536 INFO L225 Difference]: With dead ends: 248 [2021-06-05 13:56:59,536 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 13:56:59,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 13:56:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-06-05 13:56:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-06-05 13:56:59,540 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-06-05 13:56:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,540 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-06-05 13:56:59,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-06-05 13:56:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:59,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,541 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:59,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,748 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-06-05 13:56:59,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:59,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306247307] [2021-06-05 13:56:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306247307] [2021-06-05 13:56:59,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306247307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369595287] [2021-06-05 13:56:59,775 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:56:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:59,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369595287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:59,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:56:59,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475966512] [2021-06-05 13:56:59,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:56:59,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:59,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:56:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:56:59,832 INFO L87 Difference]: Start difference. First operand 192 states and 562 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:59,901 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-06-05 13:56:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:56:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:59,902 INFO L225 Difference]: With dead ends: 252 [2021-06-05 13:56:59,902 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 13:56:59,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 13:56:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-06-05 13:56:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-06-05 13:56:59,905 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-06-05 13:56:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,905 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-06-05 13:56:59,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-06-05 13:56:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:56:59,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,906 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:00,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 13:57:00,121 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-06-05 13:57:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:00,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38921484] [2021-06-05 13:57:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38921484] [2021-06-05 13:57:00,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38921484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786352503] [2021-06-05 13:57:00,153 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786352503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:00,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:57:00,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035547730] [2021-06-05 13:57:00,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:00,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:00,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:00,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:00,213 INFO L87 Difference]: Start difference. First operand 192 states and 561 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:00,281 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-06-05 13:57:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:00,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:00,282 INFO L225 Difference]: With dead ends: 226 [2021-06-05 13:57:00,282 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 13:57:00,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 13:57:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-06-05 13:57:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-06-05 13:57:00,285 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-06-05 13:57:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:00,285 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-06-05 13:57:00,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,285 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-06-05 13:57:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:00,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:00,286 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:00,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,501 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-06-05 13:57:00,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:00,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893227141] [2021-06-05 13:57:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:00,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893227141] [2021-06-05 13:57:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893227141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794799216] [2021-06-05 13:57:00,529 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:57:00,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:00,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794799216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:00,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:57:00,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842892864] [2021-06-05 13:57:00,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:00,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:00,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:00,574 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:00,636 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-06-05 13:57:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:00,637 INFO L225 Difference]: With dead ends: 241 [2021-06-05 13:57:00,637 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 13:57:00,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 13:57:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-06-05 13:57:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-06-05 13:57:00,640 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-06-05 13:57:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:00,640 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-06-05 13:57:00,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-06-05 13:57:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:00,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:00,641 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:00,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 13:57:00,849 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-06-05 13:57:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:00,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927551486] [2021-06-05 13:57:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:00,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927551486] [2021-06-05 13:57:00,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927551486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15603397] [2021-06-05 13:57:00,879 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:00,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15603397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:00,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:57:00,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980632766] [2021-06-05 13:57:00,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:00,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:00,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:00,934 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:01,012 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-06-05 13:57:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:01,013 INFO L225 Difference]: With dead ends: 216 [2021-06-05 13:57:01,013 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:57:01,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:57:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-06-05 13:57:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-06-05 13:57:01,018 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-06-05 13:57:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:01,018 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-06-05 13:57:01,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-06-05 13:57:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:01,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:01,018 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:01,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:01,219 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-06-05 13:57:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:01,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279132182] [2021-06-05 13:57:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:01,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279132182] [2021-06-05 13:57:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279132182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735973270] [2021-06-05 13:57:01,254 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:01,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735973270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:01,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:57:01,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748540179] [2021-06-05 13:57:01,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:01,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:01,302 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:01,359 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-06-05 13:57:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:01,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:01,360 INFO L225 Difference]: With dead ends: 234 [2021-06-05 13:57:01,360 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 13:57:01,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 13:57:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-06-05 13:57:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-06-05 13:57:01,363 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-06-05 13:57:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-06-05 13:57:01,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-06-05 13:57:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:57:01,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:01,363 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:01,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 13:57:01,579 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-06-05 13:57:01,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:01,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810419542] [2021-06-05 13:57:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:01,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:01,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810419542] [2021-06-05 13:57:01,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810419542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453702977] [2021-06-05 13:57:01,612 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:01,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:01,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:01,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:57:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453702977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:01,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:57:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891305317] [2021-06-05 13:57:01,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:57:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:57:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:57:01,672 INFO L87 Difference]: Start difference. First operand 188 states and 548 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:01,768 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-06-05 13:57:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:01,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:57:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:01,769 INFO L225 Difference]: With dead ends: 251 [2021-06-05 13:57:01,769 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 13:57:01,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 13:57:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-06-05 13:57:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-06-05 13:57:01,772 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-06-05 13:57:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:01,772 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-06-05 13:57:01,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-06-05 13:57:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:57:01,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:01,773 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:01,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:57:01,989 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-06-05 13:57:01,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:01,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172498252] [2021-06-05 13:57:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:02,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:02,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172498252] [2021-06-05 13:57:02,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172498252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171856155] [2021-06-05 13:57:02,060 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171856155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:02,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 13:57:02,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480764500] [2021-06-05 13:57:02,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:02,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:02,136 INFO L87 Difference]: Start difference. First operand 196 states and 570 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:02,199 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-06-05 13:57:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:57:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 13:57:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:02,201 INFO L225 Difference]: With dead ends: 378 [2021-06-05 13:57:02,201 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 13:57:02,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 13:57:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-06-05 13:57:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-06-05 13:57:02,204 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-06-05 13:57:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:02,204 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-06-05 13:57:02,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-06-05 13:57:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:57:02,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:02,205 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:57:02,421 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-06-05 13:57:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658262021] [2021-06-05 13:57:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:02,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658262021] [2021-06-05 13:57:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658262021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76993554] [2021-06-05 13:57:02,488 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 [2021-06-05 13:57:02,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:02,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76993554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:02,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 13:57:02,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697037519] [2021-06-05 13:57:02,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:02,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:02,568 INFO L87 Difference]: Start difference. First operand 234 states and 666 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:02,637 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-06-05 13:57:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:57:02,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:57:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:02,638 INFO L225 Difference]: With dead ends: 439 [2021-06-05 13:57:02,638 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 13:57:02,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 13:57:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-06-05 13:57:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-06-05 13:57:02,643 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-06-05 13:57:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:02,643 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-06-05 13:57:02,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-06-05 13:57:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:57:02,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:02,644 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:02,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:57:02,859 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-06-05 13:57:02,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:02,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418978368] [2021-06-05 13:57:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418978368] [2021-06-05 13:57:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418978368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885978283] [2021-06-05 13:57:02,934 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 [2021-06-05 13:57:02,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:57:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:03,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885978283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:03,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:03,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 13:57:03,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615722001] [2021-06-05 13:57:03,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:03,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:03,042 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:03,149 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-06-05 13:57:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:57:03,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 13:57:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:03,151 INFO L225 Difference]: With dead ends: 508 [2021-06-05 13:57:03,151 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 13:57:03,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 13:57:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-06-05 13:57:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-06-05 13:57:03,156 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-06-05 13:57:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:03,156 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-06-05 13:57:03,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-06-05 13:57:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:03,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:03,157 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:03,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:57:03,373 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-06-05 13:57:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:03,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114157357] [2021-06-05 13:57:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:03,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:03,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114157357] [2021-06-05 13:57:03,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114157357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:03,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651610508] [2021-06-05 13:57:03,424 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:03,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:03,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:03,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:04,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:04,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:04,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:04,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:04,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651610508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:04,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:04,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232428529] [2021-06-05 13:57:04,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:04,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:04,990 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-06-05 13:57:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:05,167 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-06-05 13:57:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 19 [2021-06-05 13:57:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:05,168 INFO L225 Difference]: With dead ends: 489 [2021-06-05 13:57:05,169 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 13:57:05,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 13:57:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-06-05 13:57:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-06-05 13:57:05,174 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-06-05 13:57:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:05,174 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-06-05 13:57:05,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-06-05 13:57:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-06-05 13:57:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:05,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:05,175 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:05,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:57:05,381 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-06-05 13:57:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:05,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848126340] [2021-06-05 13:57:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:05,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848126340] [2021-06-05 13:57:05,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848126340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111013104] [2021-06-05 13:57:05,440 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:05,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:05,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:05,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:06,976 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 236 [2021-06-05 13:57:07,788 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-06-05 13:57:07,988 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 310 [2021-06-05 13:57:08,243 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 315 [2021-06-05 13:57:08,413 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 349 [2021-06-05 13:57:09,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:09,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:09,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:09,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:09,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111013104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:09,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:09,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885429072] [2021-06-05 13:57:09,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:09,050 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:09,231 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-06-05 13:57:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:09,234 INFO L225 Difference]: With dead ends: 556 [2021-06-05 13:57:09,234 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 13:57:09,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 13:57:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-06-05 13:57:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-06-05 13:57:09,239 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-06-05 13:57:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:09,240 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-06-05 13:57:09,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-06-05 13:57:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:09,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:09,241 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:09,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:09,457 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-06-05 13:57:09,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:09,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254457460] [2021-06-05 13:57:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254457460] [2021-06-05 13:57:09,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254457460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778894233] [2021-06-05 13:57:09,516 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:09,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:09,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:09,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:10,647 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-06-05 13:57:10,784 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 363 [2021-06-05 13:57:10,945 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 374 [2021-06-05 13:57:12,405 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 320 [2021-06-05 13:57:12,642 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-06-05 13:57:12,875 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 372 [2021-06-05 13:57:13,130 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 379 [2021-06-05 13:57:13,404 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 432 [2021-06-05 13:57:13,941 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 233 [2021-06-05 13:57:14,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:14,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:14,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:14,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778894233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:14,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:14,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:14,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856046494] [2021-06-05 13:57:14,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:14,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:14,327 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:14,459 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-06-05 13:57:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:14,462 INFO L225 Difference]: With dead ends: 627 [2021-06-05 13:57:14,462 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 13:57:14,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 13:57:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-06-05 13:57:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-06-05 13:57:14,471 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-06-05 13:57:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:14,471 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-06-05 13:57:14,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-06-05 13:57:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:14,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:14,472 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:14,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:14,673 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-06-05 13:57:14,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:14,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847064051] [2021-06-05 13:57:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:14,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:14,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847064051] [2021-06-05 13:57:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847064051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:14,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492895120] [2021-06-05 13:57:14,719 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:15,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:15,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:16,248 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 272 [2021-06-05 13:57:16,355 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 270 [2021-06-05 13:57:16,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:16,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:16,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:16,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:16,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492895120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:16,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:16,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010313088] [2021-06-05 13:57:16,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:16,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:16,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:16,962 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:17,157 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-06-05 13:57:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:17,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:17,160 INFO L225 Difference]: With dead ends: 708 [2021-06-05 13:57:17,160 INFO L226 Difference]: Without dead ends: 705 [2021-06-05 13:57:17,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-06-05 13:57:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-06-05 13:57:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-06-05 13:57:17,168 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-06-05 13:57:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:17,168 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-06-05 13:57:17,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-06-05 13:57:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:17,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:17,169 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:17,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-05 13:57:17,384 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-06-05 13:57:17,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:17,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456923712] [2021-06-05 13:57:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:17,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:17,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456923712] [2021-06-05 13:57:17,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456923712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:17,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137815058] [2021-06-05 13:57:17,431 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:17,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:17,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:17,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:18,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:18,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:18,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137815058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:18,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733066797] [2021-06-05 13:57:18,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:18,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:18,868 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:19,026 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-06-05 13:57:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:19,029 INFO L225 Difference]: With dead ends: 810 [2021-06-05 13:57:19,029 INFO L226 Difference]: Without dead ends: 807 [2021-06-05 13:57:19,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-06-05 13:57:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-06-05 13:57:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-06-05 13:57:19,038 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-06-05 13:57:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:19,038 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-06-05 13:57:19,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-06-05 13:57:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:19,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:19,039 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:19,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:19,256 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-06-05 13:57:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:19,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123187879] [2021-06-05 13:57:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:19,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123187879] [2021-06-05 13:57:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123187879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045356136] [2021-06-05 13:57:19,315 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:19,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:19,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:20,121 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-06-05 13:57:20,229 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 291 [2021-06-05 13:57:20,364 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 298 [2021-06-05 13:57:21,204 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 255 [2021-06-05 13:57:21,417 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 263 [2021-06-05 13:57:21,593 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 210 [2021-06-05 13:57:22,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:22,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:22,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:22,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:22,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045356136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:22,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422696345] [2021-06-05 13:57:22,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:22,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:22,154 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:22,325 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-06-05 13:57:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,328 INFO L225 Difference]: With dead ends: 900 [2021-06-05 13:57:22,328 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 13:57:22,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 13:57:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-06-05 13:57:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-06-05 13:57:22,338 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-06-05 13:57:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:22,338 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-06-05 13:57:22,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-06-05 13:57:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:22,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:22,339 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:22,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1509 [2021-06-05 13:57:22,546 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-06-05 13:57:22,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:22,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334789159] [2021-06-05 13:57:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:22,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334789159] [2021-06-05 13:57:22,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334789159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403753157] [2021-06-05 13:57:22,593 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 [2021-06-05 13:57:22,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:22,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:22,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:22,864 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 13:57:22,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:24,173 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-06-05 13:57:24,422 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-06-05 13:57:24,664 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 455 [2021-06-05 13:57:24,934 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 460 [2021-06-05 13:57:25,038 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 256 [2021-06-05 13:57:25,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:25,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:25,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:25,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:25,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403753157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:25,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:25,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006482992] [2021-06-05 13:57:25,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:25,506 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:25,686 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-06-05 13:57:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:25,690 INFO L225 Difference]: With dead ends: 993 [2021-06-05 13:57:25,690 INFO L226 Difference]: Without dead ends: 990 [2021-06-05 13:57:25,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-06-05 13:57:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-06-05 13:57:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-06-05 13:57:25,701 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-06-05 13:57:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:25,701 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-06-05 13:57:25,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-06-05 13:57:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:25,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:25,702 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:25,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1805,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:25,917 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-06-05 13:57:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260570711] [2021-06-05 13:57:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:25,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260570711] [2021-06-05 13:57:25,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260570711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807996178] [2021-06-05 13:57:25,968 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 [2021-06-05 13:57:25,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:25,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:25,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:26,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:26,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:27,605 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 250 [2021-06-05 13:57:27,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:27,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:27,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:27,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807996178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:27,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763188912] [2021-06-05 13:57:27,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:27,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:27,821 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:28,010 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-06-05 13:57:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:28,013 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 13:57:28,013 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 13:57:28,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 13:57:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-06-05 13:57:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-06-05 13:57:28,025 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-06-05 13:57:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:28,025 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-06-05 13:57:28,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-06-05 13:57:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:57:28,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:28,026 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-06-05 13:57:28,238 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-06-05 13:57:28,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248554945] [2021-06-05 13:57:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:28,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248554945] [2021-06-05 13:57:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248554945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209822486] [2021-06-05 13:57:28,287 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:28,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:28,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 13:57:28,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:28,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:28,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 13:57:29,116 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 348 [2021-06-05 13:57:29,642 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-06-05 13:57:29,859 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 507 [2021-06-05 13:57:30,129 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 518 [2021-06-05 13:57:30,978 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 701 [2021-06-05 13:57:31,701 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 513 [2021-06-05 13:57:32,281 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 264 [2021-06-05 13:57:33,110 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 280 [2021-06-05 13:57:33,267 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 335 [2021-06-05 13:57:33,573 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-06-05 13:57:33,872 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 347 [2021-06-05 13:57:34,190 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 998 DAG size of output: 352 [2021-06-05 13:57:34,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:57:34,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:57:34,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:57:34,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:57:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209822486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:34,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 13:57:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122999274] [2021-06-05 13:57:34,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:34,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:34,686 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:34,873 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-06-05 13:57:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:57:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 19 [2021-06-05 13:57:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:34,878 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 13:57:34,878 INFO L226 Difference]: Without dead ends: 1149 [2021-06-05 13:57:34,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-06-05 13:57:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-06-05 13:57:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-06-05 13:57:34,891 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-06-05 13:57:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:34,891 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-06-05 13:57:34,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-06-05 13:57:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-06-05 13:57:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:34,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:34,893 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,101 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-06-05 13:57:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636812845] [2021-06-05 13:57:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636812845] [2021-06-05 13:57:35,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636812845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489856652] [2021-06-05 13:57:35,166 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489856652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388173326] [2021-06-05 13:57:35,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:35,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:35,280 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:35,441 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-06-05 13:57:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:35,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:35,462 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 13:57:35,462 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 13:57:35,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 13:57:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-06-05 13:57:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-06-05 13:57:35,489 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-06-05 13:57:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:35,489 INFO L482 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-06-05 13:57:35,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-06-05 13:57:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:35,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:35,491 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3016,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,691 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,691 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-06-05 13:57:35,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020580224] [2021-06-05 13:57:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020580224] [2021-06-05 13:57:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020580224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088404619] [2021-06-05 13:57:35,769 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:35,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:35,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088404619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140193665] [2021-06-05 13:57:35,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:35,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:35,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:35,832 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,075 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-06-05 13:57:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:57:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,077 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 13:57:36,077 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 13:57:36,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:57:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 13:57:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-06-05 13:57:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-06-05 13:57:36,092 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-06-05 13:57:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,092 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-06-05 13:57:36,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-06-05 13:57:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:36,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,093 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,294 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-06-05 13:57:36,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:36,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271088474] [2021-06-05 13:57:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271088474] [2021-06-05 13:57:36,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271088474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473982291] [2021-06-05 13:57:36,368 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:36,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:36,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473982291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:36,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619637226] [2021-06-05 13:57:36,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:36,439 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,550 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-06-05 13:57:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,552 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 13:57:36,552 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 13:57:36,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 13:57:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-06-05 13:57:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-06-05 13:57:36,564 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-06-05 13:57:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,564 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-06-05 13:57:36,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-06-05 13:57:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:36,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,566 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:36,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3018,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,777 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-06-05 13:57:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889783734] [2021-06-05 13:57:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:36,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889783734] [2021-06-05 13:57:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889783734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249282295] [2021-06-05 13:57:36,869 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:36,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:37,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249282295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:37,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4473540] [2021-06-05 13:57:37,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:37,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:37,006 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,061 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-06-05 13:57:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,063 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 13:57:37,063 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 13:57:37,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 13:57:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-06-05 13:57:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-06-05 13:57:37,076 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-06-05 13:57:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,076 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-06-05 13:57:37,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-06-05 13:57:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:37,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,078 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3019 [2021-06-05 13:57:37,280 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-06-05 13:57:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083160038] [2021-06-05 13:57:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:37,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083160038] [2021-06-05 13:57:37,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083160038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003853147] [2021-06-05 13:57:37,331 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:37,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:37,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:37,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003853147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284911985] [2021-06-05 13:57:37,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:37,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:37,395 INFO L87 Difference]: Start difference. First operand 995 states and 3238 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,485 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-06-05 13:57:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,487 INFO L225 Difference]: With dead ends: 1213 [2021-06-05 13:57:37,487 INFO L226 Difference]: Without dead ends: 1213 [2021-06-05 13:57:37,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-06-05 13:57:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-06-05 13:57:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-06-05 13:57:37,500 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-06-05 13:57:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,500 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-06-05 13:57:37,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-06-05 13:57:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:37,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,501 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 13:57:37,702 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-06-05 13:57:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369803968] [2021-06-05 13:57:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:37,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369803968] [2021-06-05 13:57:37,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369803968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600393750] [2021-06-05 13:57:37,757 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:37,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:37,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600393750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691921422] [2021-06-05 13:57:37,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:37,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:37,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:37,811 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,950 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-06-05 13:57:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,952 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 13:57:37,952 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 13:57:37,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 13:57:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-06-05 13:57:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-06-05 13:57:37,973 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-06-05 13:57:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,973 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-06-05 13:57:37,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-06-05 13:57:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:37,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,975 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:38,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3021,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:38,189 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-06-05 13:57:38,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:38,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828595178] [2021-06-05 13:57:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:38,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828595178] [2021-06-05 13:57:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828595178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351800296] [2021-06-05 13:57:38,243 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 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 [2021-06-05 13:57:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351800296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:38,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:38,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578391130] [2021-06-05 13:57:38,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:38,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:38,303 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,418 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-06-05 13:57:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,420 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 13:57:38,420 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 13:57:38,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 13:57:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-06-05 13:57:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-06-05 13:57:38,432 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-06-05 13:57:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,432 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-06-05 13:57:38,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-06-05 13:57:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:38,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,434 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:38,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-06-05 13:57:38,645 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-06-05 13:57:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:38,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412162979] [2021-06-05 13:57:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:38,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412162979] [2021-06-05 13:57:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412162979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600018278] [2021-06-05 13:57:38,696 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 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 [2021-06-05 13:57:38,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:38,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600018278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:38,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800276122] [2021-06-05 13:57:38,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:38,755 INFO L87 Difference]: Start difference. First operand 998 states and 3227 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,804 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-06-05 13:57:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,806 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 13:57:38,806 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 13:57:38,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 13:57:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-06-05 13:57:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-06-05 13:57:38,819 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-06-05 13:57:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,819 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-06-05 13:57:38,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-06-05 13:57:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:38,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,820 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-05 13:57:39,037 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-06-05 13:57:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941978136] [2021-06-05 13:57:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941978136] [2021-06-05 13:57:39,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941978136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737552476] [2021-06-05 13:57:39,087 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 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 [2021-06-05 13:57:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:39,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737552476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301654328] [2021-06-05 13:57:39,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:39,154 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,285 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-06-05 13:57:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,287 INFO L225 Difference]: With dead ends: 1102 [2021-06-05 13:57:39,287 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 13:57:39,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 13:57:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-06-05 13:57:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-06-05 13:57:39,298 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-06-05 13:57:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,298 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-06-05 13:57:39,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-06-05 13:57:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:39,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,300 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:39,500 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-06-05 13:57:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242726187] [2021-06-05 13:57:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242726187] [2021-06-05 13:57:39,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242726187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072081401] [2021-06-05 13:57:39,551 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 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 [2021-06-05 13:57:39,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:39,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072081401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:39,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554318973] [2021-06-05 13:57:39,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:39,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:39,612 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,680 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-06-05 13:57:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:39,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,686 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 13:57:39,686 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 13:57:39,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 13:57:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-06-05 13:57:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-06-05 13:57:39,700 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-06-05 13:57:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,700 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-06-05 13:57:39,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-06-05 13:57:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:39,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,702 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:39,918 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,918 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-06-05 13:57:39,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184326567] [2021-06-05 13:57:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:39,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184326567] [2021-06-05 13:57:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184326567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422566856] [2021-06-05 13:57:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:57:39,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:39,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:40,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422566856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299024875] [2021-06-05 13:57:40,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:40,029 INFO L87 Difference]: Start difference. First operand 965 states and 3099 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,117 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-06-05 13:57:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,119 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 13:57:40,119 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 13:57:40,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 13:57:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-06-05 13:57:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-06-05 13:57:40,130 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-06-05 13:57:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,130 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-06-05 13:57:40,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-06-05 13:57:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:40,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,131 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:40,332 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-06-05 13:57:40,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025182238] [2021-06-05 13:57:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025182238] [2021-06-05 13:57:40,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025182238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468185699] [2021-06-05 13:57:40,383 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 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 [2021-06-05 13:57:40,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468185699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513753160] [2021-06-05 13:57:40,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:40,439 INFO L87 Difference]: Start difference. First operand 959 states and 3058 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,559 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-06-05 13:57:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:40,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,561 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 13:57:40,561 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 13:57:40,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 13:57:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-06-05 13:57:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-06-05 13:57:40,573 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-06-05 13:57:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,573 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-06-05 13:57:40,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-06-05 13:57:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:40,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,574 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:40,775 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-06-05 13:57:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568167136] [2021-06-05 13:57:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568167136] [2021-06-05 13:57:40,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568167136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494656341] [2021-06-05 13:57:40,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:57:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494656341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:40,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075699864] [2021-06-05 13:57:40,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:40,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:40,890 INFO L87 Difference]: Start difference. First operand 971 states and 3098 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,028 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-06-05 13:57:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:41,030 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 13:57:41,030 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 13:57:41,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 13:57:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-06-05 13:57:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-06-05 13:57:41,041 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-06-05 13:57:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,041 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-06-05 13:57:41,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-06-05 13:57:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:41,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:41,042 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,258 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-06-05 13:57:41,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127840062] [2021-06-05 13:57:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127840062] [2021-06-05 13:57:41,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127840062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999481661] [2021-06-05 13:57:41,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:57:41,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:41,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999481661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:41,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804509116] [2021-06-05 13:57:41,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:41,476 INFO L87 Difference]: Start difference. First operand 965 states and 3075 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,541 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-06-05 13:57:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:41,543 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 13:57:41,543 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 13:57:41,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 13:57:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-06-05 13:57:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-06-05 13:57:41,554 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-06-05 13:57:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,554 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-06-05 13:57:41,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-06-05 13:57:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:41,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:41,556 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,784 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-06-05 13:57:41,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082489394] [2021-06-05 13:57:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082489394] [2021-06-05 13:57:41,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082489394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235383959] [2021-06-05 13:57:41,839 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 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 [2021-06-05 13:57:41,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:41,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:41,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235383959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:41,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40715019] [2021-06-05 13:57:41,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:41,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:41,900 INFO L87 Difference]: Start difference. First operand 967 states and 3081 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,038 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-06-05 13:57:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:42,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,040 INFO L225 Difference]: With dead ends: 1112 [2021-06-05 13:57:42,040 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 13:57:42,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 13:57:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-06-05 13:57:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-06-05 13:57:42,053 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-06-05 13:57:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,053 INFO L482 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-06-05 13:57:42,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-06-05 13:57:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:42,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,054 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:42,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-06-05 13:57:42,270 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-06-05 13:57:42,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:42,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339847877] [2021-06-05 13:57:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:42,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339847877] [2021-06-05 13:57:42,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339847877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098251408] [2021-06-05 13:57:42,321 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 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 [2021-06-05 13:57:42,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:42,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098251408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:42,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:42,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015084828] [2021-06-05 13:57:42,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:42,386 INFO L87 Difference]: Start difference. First operand 967 states and 3077 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,459 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-06-05 13:57:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,460 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 13:57:42,460 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 13:57:42,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 13:57:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-06-05 13:57:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-06-05 13:57:42,475 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-06-05 13:57:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,475 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-06-05 13:57:42,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-06-05 13:57:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:42,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,477 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:42,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-06-05 13:57:42,693 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-06-05 13:57:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:42,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900684101] [2021-06-05 13:57:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:42,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900684101] [2021-06-05 13:57:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900684101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347815053] [2021-06-05 13:57:42,745 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 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 [2021-06-05 13:57:42,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:42,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347815053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:42,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:42,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574057113] [2021-06-05 13:57:42,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:42,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:42,813 INFO L87 Difference]: Start difference. First operand 938 states and 2965 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,950 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-06-05 13:57:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,952 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 13:57:42,952 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 13:57:42,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 13:57:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-06-05 13:57:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-06-05 13:57:42,962 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-06-05 13:57:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,962 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-06-05 13:57:42,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-06-05 13:57:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:42,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,963 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:43,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 13:57:43,164 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-06-05 13:57:43,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:43,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510906847] [2021-06-05 13:57:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:43,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510906847] [2021-06-05 13:57:43,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510906847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269759637] [2021-06-05 13:57:43,217 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 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 [2021-06-05 13:57:43,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:43,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269759637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:43,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:43,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328400625] [2021-06-05 13:57:43,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:43,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:43,286 INFO L87 Difference]: Start difference. First operand 941 states and 2974 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:43,376 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-06-05 13:57:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:43,378 INFO L225 Difference]: With dead ends: 1725 [2021-06-05 13:57:43,378 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 13:57:43,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 13:57:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-06-05 13:57:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-06-05 13:57:43,396 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-06-05 13:57:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:43,396 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-06-05 13:57:43,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-06-05 13:57:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:43,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:43,398 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:43,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3033,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:43,615 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-06-05 13:57:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:43,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793506429] [2021-06-05 13:57:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:43,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793506429] [2021-06-05 13:57:43,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793506429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070687487] [2021-06-05 13:57:43,663 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 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 [2021-06-05 13:57:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:43,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070687487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:43,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135063122] [2021-06-05 13:57:43,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:43,720 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:43,800 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-06-05 13:57:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:43,802 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 13:57:43,802 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 13:57:43,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 13:57:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-06-05 13:57:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-06-05 13:57:43,818 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-06-05 13:57:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:43,818 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-06-05 13:57:43,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-06-05 13:57:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:43,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:43,819 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:44,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 13:57:44,020 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-06-05 13:57:44,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:44,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956604811] [2021-06-05 13:57:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:44,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956604811] [2021-06-05 13:57:44,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956604811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212003036] [2021-06-05 13:57:44,067 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 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 [2021-06-05 13:57:44,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:44,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212003036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:44,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907011243] [2021-06-05 13:57:44,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:44,118 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:44,239 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-06-05 13:57:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:44,241 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 13:57:44,241 INFO L226 Difference]: Without dead ends: 1493 [2021-06-05 13:57:44,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-05 13:57:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-06-05 13:57:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-06-05 13:57:44,257 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-06-05 13:57:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:44,257 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-06-05 13:57:44,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-06-05 13:57:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:44,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:44,259 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:44,473 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-06-05 13:57:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365504079] [2021-06-05 13:57:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:44,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365504079] [2021-06-05 13:57:44,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365504079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972319092] [2021-06-05 13:57:44,521 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 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 [2021-06-05 13:57:44,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:57:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:44,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972319092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:44,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 13:57:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672142809] [2021-06-05 13:57:44,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:57:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:57:44,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:44,651 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:45,474 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-06-05 13:57:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 13:57:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:45,477 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 13:57:45,477 INFO L226 Difference]: Without dead ends: 2110 [2021-06-05 13:57:45,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 13:57:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-05 13:57:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-06-05 13:57:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-06-05 13:57:45,501 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-06-05 13:57:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:45,502 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-06-05 13:57:45,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-06-05 13:57:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:45,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:45,504 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:45,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:45,718 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-06-05 13:57:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569631969] [2021-06-05 13:57:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:45,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:45,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569631969] [2021-06-05 13:57:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569631969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026278009] [2021-06-05 13:57:45,767 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 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 [2021-06-05 13:57:45,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:45,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026278009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:45,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:45,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434014490] [2021-06-05 13:57:45,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:45,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:45,825 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:45,877 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-06-05 13:57:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:45,879 INFO L225 Difference]: With dead ends: 1971 [2021-06-05 13:57:45,879 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 13:57:45,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 13:57:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-06-05 13:57:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-06-05 13:57:45,900 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-06-05 13:57:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:45,900 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-06-05 13:57:45,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-06-05 13:57:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:45,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:45,902 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:46,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:46,117 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-06-05 13:57:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:46,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801411079] [2021-06-05 13:57:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:46,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801411079] [2021-06-05 13:57:46,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801411079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664222970] [2021-06-05 13:57:46,167 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 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 [2021-06-05 13:57:46,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:46,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664222970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:46,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:46,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652597395] [2021-06-05 13:57:46,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:46,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:46,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:46,234 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:46,310 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-06-05 13:57:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:46,312 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 13:57:46,313 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 13:57:46,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 13:57:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-06-05 13:57:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-06-05 13:57:46,335 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-06-05 13:57:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:46,335 INFO L482 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-06-05 13:57:46,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-06-05 13:57:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:46,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:46,337 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:46,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3038 [2021-06-05 13:57:46,553 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-06-05 13:57:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:46,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990818828] [2021-06-05 13:57:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:46,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990818828] [2021-06-05 13:57:46,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990818828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029368715] [2021-06-05 13:57:46,602 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 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 [2021-06-05 13:57:46,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029368715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:46,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:46,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300493246] [2021-06-05 13:57:46,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:46,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:46,670 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:46,755 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-06-05 13:57:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:46,759 INFO L225 Difference]: With dead ends: 2650 [2021-06-05 13:57:46,759 INFO L226 Difference]: Without dead ends: 2650 [2021-06-05 13:57:46,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-05 13:57:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-06-05 13:57:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-06-05 13:57:46,786 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-06-05 13:57:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:46,786 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-06-05 13:57:46,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-06-05 13:57:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:46,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:46,789 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:46,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:46,989 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-06-05 13:57:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:46,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165190440] [2021-06-05 13:57:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:47,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165190440] [2021-06-05 13:57:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165190440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326477820] [2021-06-05 13:57:47,042 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 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 [2021-06-05 13:57:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326477820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:47,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:47,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746398280] [2021-06-05 13:57:47,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:47,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:47,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:47,108 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:47,247 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-06-05 13:57:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:57:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:47,253 INFO L225 Difference]: With dead ends: 3538 [2021-06-05 13:57:47,253 INFO L226 Difference]: Without dead ends: 3538 [2021-06-05 13:57:47,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-05 13:57:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-06-05 13:57:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-06-05 13:57:47,298 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-06-05 13:57:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:47,298 INFO L482 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-06-05 13:57:47,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-06-05 13:57:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:47,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:47,301 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:47,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 13:57:47,507 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-06-05 13:57:47,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:47,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487959521] [2021-06-05 13:57:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:47,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:47,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487959521] [2021-06-05 13:57:47,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487959521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268439604] [2021-06-05 13:57:47,570 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 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 [2021-06-05 13:57:47,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268439604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:47,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373591507] [2021-06-05 13:57:47,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:47,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:47,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:47,621 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:47,738 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-06-05 13:57:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:47,742 INFO L225 Difference]: With dead ends: 3252 [2021-06-05 13:57:47,743 INFO L226 Difference]: Without dead ends: 3250 [2021-06-05 13:57:47,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-06-05 13:57:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-06-05 13:57:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-06-05 13:57:47,782 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-06-05 13:57:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:47,783 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-06-05 13:57:47,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-06-05 13:57:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:47,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:47,785 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:47,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-06-05 13:57:47,986 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-06-05 13:57:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:47,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981153732] [2021-06-05 13:57:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:48,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:48,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981153732] [2021-06-05 13:57:48,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981153732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009313807] [2021-06-05 13:57:48,032 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 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 [2021-06-05 13:57:48,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:48,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:48,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:48,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009313807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:48,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:48,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219983661] [2021-06-05 13:57:48,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:48,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:48,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:48,092 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:48,143 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-06-05 13:57:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:48,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:48,147 INFO L225 Difference]: With dead ends: 3239 [2021-06-05 13:57:48,147 INFO L226 Difference]: Without dead ends: 3239 [2021-06-05 13:57:48,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-06-05 13:57:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-06-05 13:57:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-06-05 13:57:48,192 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-06-05 13:57:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:48,192 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-06-05 13:57:48,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-06-05 13:57:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:48,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:48,195 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3042,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:48,413 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-06-05 13:57:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368462027] [2021-06-05 13:57:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:48,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:48,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368462027] [2021-06-05 13:57:48,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368462027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845666075] [2021-06-05 13:57:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 13:57:48,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:48,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845666075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:48,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:48,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677480580] [2021-06-05 13:57:48,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:48,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:48,534 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:48,607 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-06-05 13:57:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:48,612 INFO L225 Difference]: With dead ends: 3341 [2021-06-05 13:57:48,612 INFO L226 Difference]: Without dead ends: 3341 [2021-06-05 13:57:48,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-05 13:57:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-06-05 13:57:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-06-05 13:57:48,648 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-06-05 13:57:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:48,649 INFO L482 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-06-05 13:57:48,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-06-05 13:57:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:48,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:48,652 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:48,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3043,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:48,852 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-06-05 13:57:48,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:48,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452109244] [2021-06-05 13:57:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:48,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452109244] [2021-06-05 13:57:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452109244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305903160] [2021-06-05 13:57:48,903 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 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 [2021-06-05 13:57:48,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305903160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:48,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:48,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518827191] [2021-06-05 13:57:48,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:48,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:48,961 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:49,046 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-06-05 13:57:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:49,052 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 13:57:49,052 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 13:57:49,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 13:57:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-06-05 13:57:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-06-05 13:57:49,108 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-06-05 13:57:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:49,108 INFO L482 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-06-05 13:57:49,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-06-05 13:57:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:49,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:49,111 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:49,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 13:57:49,311 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-06-05 13:57:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356895051] [2021-06-05 13:57:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:49,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356895051] [2021-06-05 13:57:49,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356895051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477230441] [2021-06-05 13:57:49,367 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 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 [2021-06-05 13:57:49,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:49,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:49,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477230441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:49,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:49,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468345725] [2021-06-05 13:57:49,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:49,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:49,426 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:49,542 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-06-05 13:57:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:49,551 INFO L225 Difference]: With dead ends: 5440 [2021-06-05 13:57:49,551 INFO L226 Difference]: Without dead ends: 5440 [2021-06-05 13:57:49,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-06-05 13:57:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-06-05 13:57:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-06-05 13:57:49,628 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-06-05 13:57:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:49,628 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-06-05 13:57:49,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-06-05 13:57:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:49,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:49,632 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:49,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-06-05 13:57:49,832 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-06-05 13:57:49,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:49,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043414010] [2021-06-05 13:57:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:49,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043414010] [2021-06-05 13:57:49,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043414010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376687128] [2021-06-05 13:57:49,888 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376687128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:49,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:49,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687864613] [2021-06-05 13:57:49,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:49,943 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:50,117 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-06-05 13:57:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:50,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:50,126 INFO L225 Difference]: With dead ends: 6110 [2021-06-05 13:57:50,126 INFO L226 Difference]: Without dead ends: 6110 [2021-06-05 13:57:50,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-06-05 13:57:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-06-05 13:57:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-06-05 13:57:50,204 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-06-05 13:57:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:50,204 INFO L482 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-06-05 13:57:50,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-06-05 13:57:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:50,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:50,208 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:50,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:50,409 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-06-05 13:57:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:50,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487292021] [2021-06-05 13:57:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487292021] [2021-06-05 13:57:50,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487292021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194890585] [2021-06-05 13:57:50,445 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 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 [2021-06-05 13:57:50,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:50,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:50,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:57:50,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194890585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:50,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:50,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:57:50,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169873212] [2021-06-05 13:57:50,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:57:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:57:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:57:50,499 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:50,644 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-06-05 13:57:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:57:50,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:50,654 INFO L225 Difference]: With dead ends: 7038 [2021-06-05 13:57:50,654 INFO L226 Difference]: Without dead ends: 7034 [2021-06-05 13:57:50,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-06-05 13:57:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-06-05 13:57:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-06-05 13:57:50,771 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-06-05 13:57:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:50,771 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-06-05 13:57:50,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-06-05 13:57:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:50,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:50,775 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:50,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:50,976 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-06-05 13:57:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:50,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867660807] [2021-06-05 13:57:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:51,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:51,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867660807] [2021-06-05 13:57:51,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867660807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332000368] [2021-06-05 13:57:51,021 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 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 [2021-06-05 13:57:51,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:51,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:51,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:51,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332000368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:51,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:57:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175231927] [2021-06-05 13:57:51,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:51,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:51,079 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:51,181 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-06-05 13:57:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:51,193 INFO L225 Difference]: With dead ends: 7707 [2021-06-05 13:57:51,193 INFO L226 Difference]: Without dead ends: 7707 [2021-06-05 13:57:51,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-06-05 13:57:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-06-05 13:57:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-06-05 13:57:51,306 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-06-05 13:57:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-06-05 13:57:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-06-05 13:57:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:51,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:51,311 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:51,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:51,525 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-06-05 13:57:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:51,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644390965] [2021-06-05 13:57:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:51,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:51,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644390965] [2021-06-05 13:57:51,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644390965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64416793] [2021-06-05 13:57:51,575 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 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 [2021-06-05 13:57:51,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:51,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:51,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:51,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64416793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:51,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:51,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268893827] [2021-06-05 13:57:51,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:51,630 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:51,737 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-06-05 13:57:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:51,749 INFO L225 Difference]: With dead ends: 8954 [2021-06-05 13:57:51,749 INFO L226 Difference]: Without dead ends: 8954 [2021-06-05 13:57:51,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-06-05 13:57:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-06-05 13:57:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-06-05 13:57:51,864 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-06-05 13:57:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:51,864 INFO L482 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-06-05 13:57:51,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-06-05 13:57:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:51,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:51,869 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:52,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3049,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:52,070 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-06-05 13:57:52,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:52,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937321109] [2021-06-05 13:57:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:52,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937321109] [2021-06-05 13:57:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937321109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951527351] [2021-06-05 13:57:52,119 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 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 [2021-06-05 13:57:52,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:52,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951527351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:52,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:52,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046389617] [2021-06-05 13:57:52,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:52,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:52,176 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:52,327 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-06-05 13:57:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:57:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:52,342 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 13:57:52,342 INFO L226 Difference]: Without dead ends: 9105 [2021-06-05 13:57:52,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-06-05 13:57:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-06-05 13:57:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-06-05 13:57:52,493 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-06-05 13:57:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:52,493 INFO L482 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-06-05 13:57:52,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-06-05 13:57:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:52,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:52,497 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:52,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 13:57:52,698 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-06-05 13:57:52,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:52,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181074185] [2021-06-05 13:57:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:52,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181074185] [2021-06-05 13:57:52,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181074185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530128628] [2021-06-05 13:57:52,744 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 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 [2021-06-05 13:57:52,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:52,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:52,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530128628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:52,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987847052] [2021-06-05 13:57:52,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:52,801 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:52,910 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-06-05 13:57:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:52,926 INFO L225 Difference]: With dead ends: 9529 [2021-06-05 13:57:52,927 INFO L226 Difference]: Without dead ends: 9529 [2021-06-05 13:57:52,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-06-05 13:57:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-06-05 13:57:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-06-05 13:57:53,040 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-06-05 13:57:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:53,040 INFO L482 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-06-05 13:57:53,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-06-05 13:57:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:53,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:53,044 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:53,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 13:57:53,257 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-06-05 13:57:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:53,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178094651] [2021-06-05 13:57:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:53,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:53,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178094651] [2021-06-05 13:57:53,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178094651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054072003] [2021-06-05 13:57:53,309 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 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 [2021-06-05 13:57:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:53,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054072003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:53,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:53,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567714880] [2021-06-05 13:57:53,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:53,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:53,366 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:53,499 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-06-05 13:57:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:53,508 INFO L225 Difference]: With dead ends: 5911 [2021-06-05 13:57:53,508 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 13:57:53,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 13:57:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-06-05 13:57:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-06-05 13:57:53,577 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-06-05 13:57:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:53,577 INFO L482 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-06-05 13:57:53,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-06-05 13:57:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:53,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:53,581 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:53,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3052,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:53,781 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-06-05 13:57:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:53,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564420855] [2021-06-05 13:57:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:53,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564420855] [2021-06-05 13:57:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564420855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720513647] [2021-06-05 13:57:53,835 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:53,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:53,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720513647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:53,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:53,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17209882] [2021-06-05 13:57:53,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:53,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:53,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:53,890 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:54,073 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-06-05 13:57:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:54,081 INFO L225 Difference]: With dead ends: 5172 [2021-06-05 13:57:54,081 INFO L226 Difference]: Without dead ends: 5172 [2021-06-05 13:57:54,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-06-05 13:57:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-06-05 13:57:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-06-05 13:57:54,149 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-06-05 13:57:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:54,149 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-06-05 13:57:54,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-06-05 13:57:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:54,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:54,153 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:54,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3053 [2021-06-05 13:57:54,353 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-06-05 13:57:54,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:54,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540553209] [2021-06-05 13:57:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:54,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:54,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540553209] [2021-06-05 13:57:54,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540553209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190418315] [2021-06-05 13:57:54,398 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:54,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:54,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:54,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190418315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:54,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:54,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134237911] [2021-06-05 13:57:54,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:54,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:54,453 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:54,590 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-06-05 13:57:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:54,595 INFO L225 Difference]: With dead ends: 4711 [2021-06-05 13:57:54,595 INFO L226 Difference]: Without dead ends: 4707 [2021-06-05 13:57:54,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-06-05 13:57:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-06-05 13:57:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-06-05 13:57:54,645 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-06-05 13:57:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:54,646 INFO L482 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-06-05 13:57:54,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-06-05 13:57:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:54,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:54,648 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:54,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 13:57:54,848 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-06-05 13:57:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:54,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048546578] [2021-06-05 13:57:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:54,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048546578] [2021-06-05 13:57:54,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048546578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759907357] [2021-06-05 13:57:54,904 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:54,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:54,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759907357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:54,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:54,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544041703] [2021-06-05 13:57:54,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:54,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:54,960 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:55,025 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-06-05 13:57:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:55,031 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 13:57:55,031 INFO L226 Difference]: Without dead ends: 4367 [2021-06-05 13:57:55,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-06-05 13:57:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-06-05 13:57:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-06-05 13:57:55,092 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-06-05 13:57:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:55,092 INFO L482 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-06-05 13:57:55,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-06-05 13:57:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:55,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:55,095 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 13:57:55,296 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-06-05 13:57:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:55,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787952223] [2021-06-05 13:57:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:55,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787952223] [2021-06-05 13:57:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787952223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045413216] [2021-06-05 13:57:55,340 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:55,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045413216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:55,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:57:55,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883831499] [2021-06-05 13:57:55,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:55,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:55,412 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:55,480 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-06-05 13:57:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:55,487 INFO L225 Difference]: With dead ends: 4294 [2021-06-05 13:57:55,487 INFO L226 Difference]: Without dead ends: 4294 [2021-06-05 13:57:55,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-06-05 13:57:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-06-05 13:57:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-06-05 13:57:55,546 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-06-05 13:57:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-06-05 13:57:55,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-06-05 13:57:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:55,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:55,550 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:55,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 13:57:55,765 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-06-05 13:57:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:55,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115530191] [2021-06-05 13:57:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:55,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115530191] [2021-06-05 13:57:55,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115530191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257487651] [2021-06-05 13:57:55,815 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:55,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:55,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257487651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:55,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:55,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844893696] [2021-06-05 13:57:55,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:55,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:55,876 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:55,979 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-06-05 13:57:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:55,985 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 13:57:55,985 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 13:57:55,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 13:57:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-06-05 13:57:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-06-05 13:57:56,039 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-06-05 13:57:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:56,039 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-06-05 13:57:56,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-06-05 13:57:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:56,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:56,060 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:56,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:56,270 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:56,271 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-06-05 13:57:56,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:56,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732637227] [2021-06-05 13:57:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:56,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732637227] [2021-06-05 13:57:56,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732637227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477525415] [2021-06-05 13:57:56,330 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:56,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477525415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:56,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:56,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395708259] [2021-06-05 13:57:56,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:56,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:56,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:56,399 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:56,499 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-06-05 13:57:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:56,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:56,510 INFO L225 Difference]: With dead ends: 5075 [2021-06-05 13:57:56,511 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 13:57:56,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 13:57:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-06-05 13:57:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-06-05 13:57:56,566 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-06-05 13:57:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:56,566 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-06-05 13:57:56,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-06-05 13:57:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:56,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:56,569 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:56,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:56,770 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-06-05 13:57:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:56,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645762936] [2021-06-05 13:57:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645762936] [2021-06-05 13:57:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645762936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699855458] [2021-06-05 13:57:56,855 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:56,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:56,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699855458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:56,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:56,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727294869] [2021-06-05 13:57:56,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:56,927 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:57,074 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-06-05 13:57:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:57:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:57,081 INFO L225 Difference]: With dead ends: 4713 [2021-06-05 13:57:57,081 INFO L226 Difference]: Without dead ends: 4713 [2021-06-05 13:57:57,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-06-05 13:57:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-06-05 13:57:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-06-05 13:57:57,144 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-06-05 13:57:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:57,144 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-06-05 13:57:57,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-06-05 13:57:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:57,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:57,147 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:57,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:57,348 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:57,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-06-05 13:57:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:57,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676879268] [2021-06-05 13:57:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:57,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:57,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676879268] [2021-06-05 13:57:57,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676879268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:57,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747584686] [2021-06-05 13:57:57,410 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:57,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:57,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:57,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747584686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:57,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:57,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:57:57,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429118454] [2021-06-05 13:57:57,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:57,477 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:57,704 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-06-05 13:57:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:57:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:57,711 INFO L225 Difference]: With dead ends: 5066 [2021-06-05 13:57:57,711 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 13:57:57,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:57:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 13:57:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-06-05 13:57:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-06-05 13:57:57,772 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-06-05 13:57:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:57,772 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-06-05 13:57:57,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-06-05 13:57:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:57,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:57,775 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:57,976 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-06-05 13:57:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933223259] [2021-06-05 13:57:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:58,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:58,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933223259] [2021-06-05 13:57:58,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933223259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902480347] [2021-06-05 13:57:58,016 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:58,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:58,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:57:58,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902480347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:58,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:57:58,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186146784] [2021-06-05 13:57:58,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:57:58,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:57:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:57:58,075 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:58,225 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-06-05 13:57:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:58,232 INFO L225 Difference]: With dead ends: 5249 [2021-06-05 13:57:58,233 INFO L226 Difference]: Without dead ends: 5245 [2021-06-05 13:57:58,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-06-05 13:57:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-06-05 13:57:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-06-05 13:57:58,299 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-06-05 13:57:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:58,299 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-06-05 13:57:58,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-06-05 13:57:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:58,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:58,303 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:58,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-06-05 13:57:58,503 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-06-05 13:57:58,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:58,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926116412] [2021-06-05 13:57:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:58,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:58,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926116412] [2021-06-05 13:57:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926116412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263724996] [2021-06-05 13:57:58,550 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:58,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:58,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:57:58,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263724996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:58,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:58,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815897884] [2021-06-05 13:57:58,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:58,606 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:58,746 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-06-05 13:57:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:57:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:58,754 INFO L225 Difference]: With dead ends: 5919 [2021-06-05 13:57:58,754 INFO L226 Difference]: Without dead ends: 5919 [2021-06-05 13:57:58,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-06-05 13:57:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-06-05 13:57:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-06-05 13:57:58,825 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-06-05 13:57:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:58,825 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-06-05 13:57:58,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-06-05 13:57:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:58,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:58,828 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:59,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:59,029 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-06-05 13:57:59,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:59,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296264437] [2021-06-05 13:57:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296264437] [2021-06-05 13:57:59,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296264437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550768059] [2021-06-05 13:57:59,086 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:59,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:59,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:59,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550768059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:59,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:59,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291910968] [2021-06-05 13:57:59,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:59,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:59,143 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:59,274 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-06-05 13:57:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:57:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:59,283 INFO L225 Difference]: With dead ends: 6269 [2021-06-05 13:57:59,283 INFO L226 Difference]: Without dead ends: 6269 [2021-06-05 13:57:59,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-06-05 13:57:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-06-05 13:57:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-06-05 13:57:59,354 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-06-05 13:57:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:59,354 INFO L482 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-06-05 13:57:59,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-06-05 13:57:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:59,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:59,358 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:59,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-06-05 13:57:59,558 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-06-05 13:57:59,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:59,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479541446] [2021-06-05 13:57:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:59,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479541446] [2021-06-05 13:57:59,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479541446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926508849] [2021-06-05 13:57:59,612 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:57:59,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926508849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:59,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:59,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727967888] [2021-06-05 13:57:59,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:59,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:59,665 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:59,839 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-06-05 13:57:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:57:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:59,846 INFO L225 Difference]: With dead ends: 5453 [2021-06-05 13:57:59,846 INFO L226 Difference]: Without dead ends: 5453 [2021-06-05 13:57:59,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-06-05 13:57:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-06-05 13:57:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-06-05 13:57:59,917 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-06-05 13:57:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:59,917 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-06-05 13:57:59,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-06-05 13:57:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:57:59,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:59,920 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:00,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-06-05 13:58:00,133 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-06-05 13:58:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:00,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055673254] [2021-06-05 13:58:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:00,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055673254] [2021-06-05 13:58:00,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055673254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325306451] [2021-06-05 13:58:00,182 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:00,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:00,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325306451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:00,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:00,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629560781] [2021-06-05 13:58:00,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:00,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:00,242 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:00,362 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-06-05 13:58:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:00,369 INFO L225 Difference]: With dead ends: 5535 [2021-06-05 13:58:00,370 INFO L226 Difference]: Without dead ends: 5535 [2021-06-05 13:58:00,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:58:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-06-05 13:58:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-06-05 13:58:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-06-05 13:58:00,433 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-06-05 13:58:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:00,433 INFO L482 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-06-05 13:58:00,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-06-05 13:58:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:00,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:00,436 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:00,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3065 [2021-06-05 13:58:00,637 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-06-05 13:58:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:00,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040444515] [2021-06-05 13:58:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:00,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040444515] [2021-06-05 13:58:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040444515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185035990] [2021-06-05 13:58:00,690 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:00,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:00,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:00,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185035990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:00,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:00,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228781969] [2021-06-05 13:58:00,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:00,753 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:00,907 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-06-05 13:58:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:00,913 INFO L225 Difference]: With dead ends: 4959 [2021-06-05 13:58:00,914 INFO L226 Difference]: Without dead ends: 4959 [2021-06-05 13:58:00,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-05 13:58:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-06-05 13:58:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-06-05 13:58:00,970 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-06-05 13:58:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:00,970 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-06-05 13:58:00,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-06-05 13:58:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:00,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:00,973 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:01,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 13:58:01,174 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-06-05 13:58:01,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:01,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560441787] [2021-06-05 13:58:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:01,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560441787] [2021-06-05 13:58:01,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560441787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331041189] [2021-06-05 13:58:01,229 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:01,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:01,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331041189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:01,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:01,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247513400] [2021-06-05 13:58:01,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:01,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:01,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:01,296 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:01,521 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-06-05 13:58:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:58:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:01,526 INFO L225 Difference]: With dead ends: 4630 [2021-06-05 13:58:01,526 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 13:58:01,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 13:58:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-06-05 13:58:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-06-05 13:58:01,574 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-06-05 13:58:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:01,575 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-06-05 13:58:01,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-06-05 13:58:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:01,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:01,577 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:01,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 13:58:01,793 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-06-05 13:58:01,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:01,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084806368] [2021-06-05 13:58:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:01,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:01,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084806368] [2021-06-05 13:58:01,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084806368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087295385] [2021-06-05 13:58:01,834 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:01,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:01,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087295385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:01,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:01,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971781167] [2021-06-05 13:58:01,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:01,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:01,893 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:02,018 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-06-05 13:58:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:02,024 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 13:58:02,024 INFO L226 Difference]: Without dead ends: 4114 [2021-06-05 13:58:02,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-06-05 13:58:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-06-05 13:58:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-06-05 13:58:02,074 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-06-05 13:58:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:02,075 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-06-05 13:58:02,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-06-05 13:58:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:02,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:02,077 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:02,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:02,278 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-06-05 13:58:02,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:02,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134398166] [2021-06-05 13:58:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:02,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134398166] [2021-06-05 13:58:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134398166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062639608] [2021-06-05 13:58:02,325 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:02,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062639608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:02,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65319836] [2021-06-05 13:58:02,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:02,389 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:02,456 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-06-05 13:58:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:02,461 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 13:58:02,461 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 13:58:02,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 13:58:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-06-05 13:58:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-06-05 13:58:02,513 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-06-05 13:58:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:02,513 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-06-05 13:58:02,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-06-05 13:58:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:02,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:02,516 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:02,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:02,717 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-06-05 13:58:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:02,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241973879] [2021-06-05 13:58:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:02,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:02,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241973879] [2021-06-05 13:58:02,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241973879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221730416] [2021-06-05 13:58:02,762 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:02,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221730416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:02,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:02,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810402619] [2021-06-05 13:58:02,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:02,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:02,822 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:02,908 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-06-05 13:58:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:02,913 INFO L225 Difference]: With dead ends: 4122 [2021-06-05 13:58:02,913 INFO L226 Difference]: Without dead ends: 4122 [2021-06-05 13:58:02,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-06-05 13:58:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-06-05 13:58:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-06-05 13:58:02,961 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-06-05 13:58:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:02,961 INFO L482 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-06-05 13:58:02,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-06-05 13:58:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:02,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:02,964 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:03,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3070,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:03,164 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-06-05 13:58:03,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:03,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194730655] [2021-06-05 13:58:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:03,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:03,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194730655] [2021-06-05 13:58:03,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194730655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:03,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693189731] [2021-06-05 13:58:03,266 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:03,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:03,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:03,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:03,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693189731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:03,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:03,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404582673] [2021-06-05 13:58:03,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:03,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:03,328 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:03,404 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-06-05 13:58:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:58:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:03,411 INFO L225 Difference]: With dead ends: 5426 [2021-06-05 13:58:03,412 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 13:58:03,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 13:58:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-06-05 13:58:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-06-05 13:58:03,482 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-06-05 13:58:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:03,482 INFO L482 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-06-05 13:58:03,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-06-05 13:58:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:03,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:03,486 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:03,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:03,693 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-06-05 13:58:03,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:03,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111914467] [2021-06-05 13:58:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:03,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111914467] [2021-06-05 13:58:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111914467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:03,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289647324] [2021-06-05 13:58:03,759 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:03,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289647324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:03,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:03,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:03,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696499813] [2021-06-05 13:58:03,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:03,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:03,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:03,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:03,825 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:03,931 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-06-05 13:58:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:03,938 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 13:58:03,938 INFO L226 Difference]: Without dead ends: 5508 [2021-06-05 13:58:03,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-05 13:58:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-06-05 13:58:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-06-05 13:58:04,006 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-06-05 13:58:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:04,006 INFO L482 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-06-05 13:58:04,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-06-05 13:58:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:04,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:04,010 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:04,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 13:58:04,210 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:04,211 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-06-05 13:58:04,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:04,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845653102] [2021-06-05 13:58:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:04,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:04,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845653102] [2021-06-05 13:58:04,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845653102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531784707] [2021-06-05 13:58:04,263 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:04,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:04,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:04,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531784707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:04,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:04,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112985543] [2021-06-05 13:58:04,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:04,323 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:04,430 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-06-05 13:58:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:04,437 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 13:58:04,437 INFO L226 Difference]: Without dead ends: 5808 [2021-06-05 13:58:04,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-06-05 13:58:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-06-05 13:58:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-06-05 13:58:04,512 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-06-05 13:58:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:04,512 INFO L482 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-06-05 13:58:04,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-06-05 13:58:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:04,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:04,516 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:04,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 13:58:04,732 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-06-05 13:58:04,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:04,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137796854] [2021-06-05 13:58:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:04,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:04,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137796854] [2021-06-05 13:58:04,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137796854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060709550] [2021-06-05 13:58:04,787 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:04,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:04,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:04,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060709550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:04,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:04,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181778936] [2021-06-05 13:58:04,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:04,849 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:05,036 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-06-05 13:58:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:05,044 INFO L225 Difference]: With dead ends: 6051 [2021-06-05 13:58:05,044 INFO L226 Difference]: Without dead ends: 6051 [2021-06-05 13:58:05,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:58:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-05 13:58:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-06-05 13:58:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-06-05 13:58:05,119 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-06-05 13:58:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:05,119 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-06-05 13:58:05,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-06-05 13:58:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:05,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:05,123 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:05,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:05,324 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-06-05 13:58:05,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:05,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989431555] [2021-06-05 13:58:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:05,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:05,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989431555] [2021-06-05 13:58:05,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989431555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:05,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738479474] [2021-06-05 13:58:05,383 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:05,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:05,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:05,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738479474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:05,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:05,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:05,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483013055] [2021-06-05 13:58:05,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:05,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:05,457 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:05,726 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-06-05 13:58:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:58:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:05,735 INFO L225 Difference]: With dead ends: 6305 [2021-06-05 13:58:05,735 INFO L226 Difference]: Without dead ends: 6305 [2021-06-05 13:58:05,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-05 13:58:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-06-05 13:58:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-06-05 13:58:05,815 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-06-05 13:58:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:05,815 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-06-05 13:58:05,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-06-05 13:58:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:05,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:05,819 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:06,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 13:58:06,020 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-06-05 13:58:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:06,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874524192] [2021-06-05 13:58:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:06,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874524192] [2021-06-05 13:58:06,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874524192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839291180] [2021-06-05 13:58:06,074 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839291180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142071584] [2021-06-05 13:58:06,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:06,125 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:06,294 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-06-05 13:58:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:06,323 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 13:58:06,323 INFO L226 Difference]: Without dead ends: 6085 [2021-06-05 13:58:06,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-06-05 13:58:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-06-05 13:58:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-06-05 13:58:06,391 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-06-05 13:58:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:06,391 INFO L482 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-06-05 13:58:06,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-06-05 13:58:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:06,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:06,395 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:06,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3076,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:06,595 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-06-05 13:58:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:06,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673103086] [2021-06-05 13:58:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:06,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673103086] [2021-06-05 13:58:06,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673103086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13902199] [2021-06-05 13:58:06,648 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:06,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:06,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13902199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:06,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:06,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732540205] [2021-06-05 13:58:06,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:06,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:06,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:06,705 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:06,905 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-06-05 13:58:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:06,916 INFO L225 Difference]: With dead ends: 7476 [2021-06-05 13:58:06,916 INFO L226 Difference]: Without dead ends: 7476 [2021-06-05 13:58:06,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-05 13:58:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-06-05 13:58:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-06-05 13:58:07,014 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-06-05 13:58:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:07,014 INFO L482 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-06-05 13:58:07,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-06-05 13:58:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:07,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:07,018 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:07,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-06-05 13:58:07,234 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-06-05 13:58:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:07,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428738151] [2021-06-05 13:58:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:07,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:07,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428738151] [2021-06-05 13:58:07,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428738151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604426043] [2021-06-05 13:58:07,288 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:07,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:58:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604426043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:07,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:07,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757612076] [2021-06-05 13:58:07,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:07,354 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:07,537 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-06-05 13:58:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:07,548 INFO L225 Difference]: With dead ends: 7967 [2021-06-05 13:58:07,548 INFO L226 Difference]: Without dead ends: 7967 [2021-06-05 13:58:07,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-06-05 13:58:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-06-05 13:58:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-06-05 13:58:07,645 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-06-05 13:58:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:07,645 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-06-05 13:58:07,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-06-05 13:58:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:07,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:07,649 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:07,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 13:58:07,850 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-06-05 13:58:07,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:07,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943022911] [2021-06-05 13:58:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:07,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:07,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943022911] [2021-06-05 13:58:07,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943022911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255269101] [2021-06-05 13:58:07,907 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:07,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255269101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:07,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526772482] [2021-06-05 13:58:07,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:07,969 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:08,211 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-06-05 13:58:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:58:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:08,221 INFO L225 Difference]: With dead ends: 6867 [2021-06-05 13:58:08,221 INFO L226 Difference]: Without dead ends: 6867 [2021-06-05 13:58:08,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-06-05 13:58:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-06-05 13:58:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-06-05 13:58:08,303 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-06-05 13:58:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:08,303 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-06-05 13:58:08,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-06-05 13:58:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:08,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:08,307 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:08,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:08,513 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-06-05 13:58:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093199819] [2021-06-05 13:58:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:08,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:08,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093199819] [2021-06-05 13:58:08,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093199819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:08,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565616108] [2021-06-05 13:58:08,574 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:08,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:58:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:08,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:08,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565616108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:08,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:08,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:08,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584003478] [2021-06-05 13:58:08,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:08,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:08,634 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:08,781 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-06-05 13:58:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:08,802 INFO L225 Difference]: With dead ends: 6222 [2021-06-05 13:58:08,802 INFO L226 Difference]: Without dead ends: 6222 [2021-06-05 13:58:08,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-06-05 13:58:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-06-05 13:58:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-06-05 13:58:08,886 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-06-05 13:58:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:08,886 INFO L482 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-06-05 13:58:08,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-06-05 13:58:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:08,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:08,891 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:09,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:09,092 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-06-05 13:58:09,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:09,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641419572] [2021-06-05 13:58:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:09,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641419572] [2021-06-05 13:58:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641419572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949420544] [2021-06-05 13:58:09,177 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:09,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:58:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:09,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949420544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:09,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:09,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337304447] [2021-06-05 13:58:09,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:09,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:09,240 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:09,445 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-06-05 13:58:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:09,454 INFO L225 Difference]: With dead ends: 5885 [2021-06-05 13:58:09,454 INFO L226 Difference]: Without dead ends: 5885 [2021-06-05 13:58:09,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:58:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-06-05 13:58:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-06-05 13:58:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-06-05 13:58:09,530 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-06-05 13:58:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:09,530 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-06-05 13:58:09,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-06-05 13:58:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:09,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:09,534 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3081 [2021-06-05 13:58:09,734 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-06-05 13:58:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:09,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084287259] [2021-06-05 13:58:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:09,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:09,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084287259] [2021-06-05 13:58:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084287259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978965677] [2021-06-05 13:58:09,790 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978965677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875693481] [2021-06-05 13:58:09,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:09,860 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:10,116 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-06-05 13:58:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:58:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:10,123 INFO L225 Difference]: With dead ends: 6017 [2021-06-05 13:58:10,124 INFO L226 Difference]: Without dead ends: 6017 [2021-06-05 13:58:10,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-06-05 13:58:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-06-05 13:58:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-06-05 13:58:10,198 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-06-05 13:58:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:10,198 INFO L482 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-06-05 13:58:10,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-06-05 13:58:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:10,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:10,202 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:10,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 13:58:10,403 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-06-05 13:58:10,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:10,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636525758] [2021-06-05 13:58:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:10,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:10,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636525758] [2021-06-05 13:58:10,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636525758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:10,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150204575] [2021-06-05 13:58:10,451 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:10,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150204575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:10,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:10,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072226298] [2021-06-05 13:58:10,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:10,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:10,502 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:10,632 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-06-05 13:58:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:10,640 INFO L225 Difference]: With dead ends: 5764 [2021-06-05 13:58:10,640 INFO L226 Difference]: Without dead ends: 5760 [2021-06-05 13:58:10,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-05 13:58:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-06-05 13:58:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-06-05 13:58:10,713 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-06-05 13:58:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:10,713 INFO L482 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-06-05 13:58:10,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-06-05 13:58:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:10,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:10,717 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:10,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3083 [2021-06-05 13:58:10,918 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-06-05 13:58:10,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:10,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459459897] [2021-06-05 13:58:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:10,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:10,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459459897] [2021-06-05 13:58:10,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459459897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:10,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862434175] [2021-06-05 13:58:10,964 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:10,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:10,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862434175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:11,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722731978] [2021-06-05 13:58:11,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:11,019 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:11,098 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-06-05 13:58:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:11,106 INFO L225 Difference]: With dead ends: 5872 [2021-06-05 13:58:11,106 INFO L226 Difference]: Without dead ends: 5872 [2021-06-05 13:58:11,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-06-05 13:58:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-06-05 13:58:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-06-05 13:58:11,180 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-06-05 13:58:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:11,180 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-06-05 13:58:11,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-06-05 13:58:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:11,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:11,184 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:11,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:11,385 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-06-05 13:58:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861795630] [2021-06-05 13:58:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861795630] [2021-06-05 13:58:11,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861795630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824807318] [2021-06-05 13:58:11,429 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:11,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824807318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:11,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585806138] [2021-06-05 13:58:11,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:11,489 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:11,583 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-06-05 13:58:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:11,590 INFO L225 Difference]: With dead ends: 5951 [2021-06-05 13:58:11,590 INFO L226 Difference]: Without dead ends: 5951 [2021-06-05 13:58:11,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-05 13:58:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-06-05 13:58:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-06-05 13:58:11,656 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-06-05 13:58:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:11,656 INFO L482 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-06-05 13:58:11,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-06-05 13:58:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:11,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:11,660 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:11,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 13:58:11,860 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-06-05 13:58:11,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:11,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588744922] [2021-06-05 13:58:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588744922] [2021-06-05 13:58:11,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588744922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208247883] [2021-06-05 13:58:11,906 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:11,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:11,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208247883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:11,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131556243] [2021-06-05 13:58:11,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:11,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:11,967 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:12,065 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-06-05 13:58:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:12,075 INFO L225 Difference]: With dead ends: 7442 [2021-06-05 13:58:12,075 INFO L226 Difference]: Without dead ends: 7442 [2021-06-05 13:58:12,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-06-05 13:58:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-06-05 13:58:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-06-05 13:58:12,170 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-06-05 13:58:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:12,170 INFO L482 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-06-05 13:58:12,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-06-05 13:58:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:12,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:12,174 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:12,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3086 [2021-06-05 13:58:12,375 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:12,375 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-06-05 13:58:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:12,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867427265] [2021-06-05 13:58:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:12,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:12,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867427265] [2021-06-05 13:58:12,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867427265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:12,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588379413] [2021-06-05 13:58:12,454 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:12,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:12,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588379413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:12,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:12,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:12,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536636165] [2021-06-05 13:58:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:12,514 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:12,592 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-06-05 13:58:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:58:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:12,602 INFO L225 Difference]: With dead ends: 7460 [2021-06-05 13:58:12,602 INFO L226 Difference]: Without dead ends: 7460 [2021-06-05 13:58:12,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-06-05 13:58:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-06-05 13:58:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-06-05 13:58:12,700 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-06-05 13:58:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:12,700 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-06-05 13:58:12,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-06-05 13:58:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:12,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:12,705 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:12,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 13:58:12,905 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-06-05 13:58:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180624306] [2021-06-05 13:58:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:12,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180624306] [2021-06-05 13:58:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180624306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:12,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533218267] [2021-06-05 13:58:12,958 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533218267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:13,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417724524] [2021-06-05 13:58:13,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:13,018 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:13,142 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-06-05 13:58:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:13,152 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 13:58:13,152 INFO L226 Difference]: Without dead ends: 7550 [2021-06-05 13:58:13,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:58:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-06-05 13:58:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-06-05 13:58:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-06-05 13:58:13,250 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-06-05 13:58:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:13,251 INFO L482 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-06-05 13:58:13,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-06-05 13:58:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:13,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:13,255 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:13,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-05 13:58:13,456 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-06-05 13:58:13,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:13,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003238747] [2021-06-05 13:58:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:13,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:13,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003238747] [2021-06-05 13:58:13,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003238747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:13,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678023109] [2021-06-05 13:58:13,517 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:13,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:13,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:13,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678023109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:13,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:13,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:13,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447639294] [2021-06-05 13:58:13,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:13,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:13,588 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:13,755 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-06-05 13:58:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:13,767 INFO L225 Difference]: With dead ends: 7595 [2021-06-05 13:58:13,767 INFO L226 Difference]: Without dead ends: 7595 [2021-06-05 13:58:13,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-06-05 13:58:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-06-05 13:58:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-06-05 13:58:13,864 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-06-05 13:58:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:13,864 INFO L482 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-06-05 13:58:13,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-06-05 13:58:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:13,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:13,869 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:14,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 13:58:14,069 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-06-05 13:58:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:14,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619496312] [2021-06-05 13:58:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:14,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:14,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619496312] [2021-06-05 13:58:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619496312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213248976] [2021-06-05 13:58:14,129 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:14,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:14,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213248976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:14,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:14,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243691828] [2021-06-05 13:58:14,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:14,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:14,190 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:14,396 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-06-05 13:58:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:14,404 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 13:58:14,405 INFO L226 Difference]: Without dead ends: 7693 [2021-06-05 13:58:14,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-05 13:58:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-06-05 13:58:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-06-05 13:58:14,506 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-06-05 13:58:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:14,506 INFO L482 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-06-05 13:58:14,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-06-05 13:58:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:14,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:14,511 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:14,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:14,711 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-06-05 13:58:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:14,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29596132] [2021-06-05 13:58:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:14,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29596132] [2021-06-05 13:58:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29596132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826075612] [2021-06-05 13:58:14,773 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:14,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:14,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826075612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:14,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:14,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261969929] [2021-06-05 13:58:14,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:14,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:14,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:14,838 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:15,111 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-06-05 13:58:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:58:15,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:15,122 INFO L225 Difference]: With dead ends: 7927 [2021-06-05 13:58:15,122 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 13:58:15,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 13:58:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-06-05 13:58:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-06-05 13:58:15,241 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-06-05 13:58:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:15,241 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-06-05 13:58:15,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-06-05 13:58:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:15,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:15,246 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:15,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3091 [2021-06-05 13:58:15,446 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-06-05 13:58:15,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:15,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108078354] [2021-06-05 13:58:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:15,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:15,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108078354] [2021-06-05 13:58:15,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108078354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:15,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109550049] [2021-06-05 13:58:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:15,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109550049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:15,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:15,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326312989] [2021-06-05 13:58:15,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:15,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:15,563 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:15,764 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-06-05 13:58:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:15,773 INFO L225 Difference]: With dead ends: 7682 [2021-06-05 13:58:15,773 INFO L226 Difference]: Without dead ends: 7678 [2021-06-05 13:58:15,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-06-05 13:58:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-06-05 13:58:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-06-05 13:58:15,861 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-06-05 13:58:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:15,861 INFO L482 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-06-05 13:58:15,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-06-05 13:58:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:15,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:15,865 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:16,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3092,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:16,065 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-06-05 13:58:16,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:16,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12880950] [2021-06-05 13:58:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:16,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12880950] [2021-06-05 13:58:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12880950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374875102] [2021-06-05 13:58:16,134 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:16,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:16,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374875102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:16,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887385367] [2021-06-05 13:58:16,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:16,197 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:16,445 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-06-05 13:58:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:16,460 INFO L225 Difference]: With dead ends: 9451 [2021-06-05 13:58:16,461 INFO L226 Difference]: Without dead ends: 9451 [2021-06-05 13:58:16,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-06-05 13:58:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-06-05 13:58:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-06-05 13:58:16,581 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-06-05 13:58:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:16,581 INFO L482 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-06-05 13:58:16,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-06-05 13:58:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:16,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:16,586 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:16,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3093 [2021-06-05 13:58:16,787 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-06-05 13:58:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:16,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494800986] [2021-06-05 13:58:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:16,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494800986] [2021-06-05 13:58:16,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494800986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138400946] [2021-06-05 13:58:16,845 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:16,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138400946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:16,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651977392] [2021-06-05 13:58:16,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:16,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:16,906 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:17,117 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-06-05 13:58:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:17,129 INFO L225 Difference]: With dead ends: 8447 [2021-06-05 13:58:17,129 INFO L226 Difference]: Without dead ends: 8447 [2021-06-05 13:58:17,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-06-05 13:58:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-06-05 13:58:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-06-05 13:58:17,242 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-06-05 13:58:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:17,242 INFO L482 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-06-05 13:58:17,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-06-05 13:58:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:17,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:17,247 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:17,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:17,448 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-06-05 13:58:17,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:17,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162952006] [2021-06-05 13:58:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:17,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:17,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162952006] [2021-06-05 13:58:17,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162952006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:17,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656920171] [2021-06-05 13:58:17,514 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:17,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:17,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656920171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:17,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:17,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:17,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55507777] [2021-06-05 13:58:17,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:17,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:17,575 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:17,843 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-06-05 13:58:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:58:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:17,852 INFO L225 Difference]: With dead ends: 8546 [2021-06-05 13:58:17,852 INFO L226 Difference]: Without dead ends: 8546 [2021-06-05 13:58:17,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-06-05 13:58:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-06-05 13:58:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-06-05 13:58:17,967 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-06-05 13:58:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:17,967 INFO L482 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-06-05 13:58:17,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-06-05 13:58:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:17,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:17,972 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-06-05 13:58:18,172 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-06-05 13:58:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902312116] [2021-06-05 13:58:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902312116] [2021-06-05 13:58:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902312116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359722376] [2021-06-05 13:58:18,225 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:18,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359722376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:18,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:18,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027136215] [2021-06-05 13:58:18,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:18,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:18,288 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:18,484 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-06-05 13:58:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:18,496 INFO L225 Difference]: With dead ends: 8149 [2021-06-05 13:58:18,497 INFO L226 Difference]: Without dead ends: 8149 [2021-06-05 13:58:18,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:58:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-06-05 13:58:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-06-05 13:58:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-06-05 13:58:18,608 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-06-05 13:58:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:18,608 INFO L482 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-06-05 13:58:18,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-06-05 13:58:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:18,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:18,613 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:18,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 13:58:18,814 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:18,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-06-05 13:58:18,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:18,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208811723] [2021-06-05 13:58:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208811723] [2021-06-05 13:58:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208811723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246839985] [2021-06-05 13:58:18,878 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:18,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246839985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:18,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:18,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581523244] [2021-06-05 13:58:18,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:18,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:18,939 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:19,177 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-06-05 13:58:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:19,188 INFO L225 Difference]: With dead ends: 8079 [2021-06-05 13:58:19,189 INFO L226 Difference]: Without dead ends: 8079 [2021-06-05 13:58:19,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-06-05 13:58:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-06-05 13:58:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-06-05 13:58:19,297 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-06-05 13:58:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:19,297 INFO L482 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-06-05 13:58:19,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-06-05 13:58:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:19,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:19,302 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-06-05 13:58:19,504 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-06-05 13:58:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611185371] [2021-06-05 13:58:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:19,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:19,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611185371] [2021-06-05 13:58:19,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611185371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:19,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706653756] [2021-06-05 13:58:19,579 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:19,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706653756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:19,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:19,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771525653] [2021-06-05 13:58:19,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:19,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:19,643 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:19,922 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-06-05 13:58:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:58:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:19,934 INFO L225 Difference]: With dead ends: 8238 [2021-06-05 13:58:19,934 INFO L226 Difference]: Without dead ends: 8238 [2021-06-05 13:58:19,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-06-05 13:58:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-06-05 13:58:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-06-05 13:58:20,044 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-06-05 13:58:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:20,044 INFO L482 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-06-05 13:58:20,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-06-05 13:58:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:20,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:20,049 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:20,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3098 [2021-06-05 13:58:20,249 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-06-05 13:58:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:20,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004308139] [2021-06-05 13:58:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:20,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:20,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004308139] [2021-06-05 13:58:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004308139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372240466] [2021-06-05 13:58:20,299 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:20,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:58:20,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:20,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372240466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:20,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:20,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327046604] [2021-06-05 13:58:20,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:20,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:20,352 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:20,494 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-06-05 13:58:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:20,505 INFO L225 Difference]: With dead ends: 8648 [2021-06-05 13:58:20,505 INFO L226 Difference]: Without dead ends: 8646 [2021-06-05 13:58:20,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-06-05 13:58:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-06-05 13:58:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-06-05 13:58:20,627 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-06-05 13:58:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:20,627 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-06-05 13:58:20,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-06-05 13:58:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:20,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:20,632 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:20,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-06-05 13:58:20,834 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-06-05 13:58:20,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:20,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357607502] [2021-06-05 13:58:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:20,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:20,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357607502] [2021-06-05 13:58:20,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357607502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426190228] [2021-06-05 13:58:20,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:20,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426190228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:20,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:20,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649950574] [2021-06-05 13:58:20,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:20,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:20,942 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:21,035 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-06-05 13:58:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:21,048 INFO L225 Difference]: With dead ends: 8734 [2021-06-05 13:58:21,048 INFO L226 Difference]: Without dead ends: 8734 [2021-06-05 13:58:21,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-06-05 13:58:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-06-05 13:58:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-06-05 13:58:21,169 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-06-05 13:58:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:21,169 INFO L482 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-06-05 13:58:21,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-06-05 13:58:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:21,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:21,174 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:21,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-06-05 13:58:21,375 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-06-05 13:58:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:21,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521495737] [2021-06-05 13:58:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:21,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521495737] [2021-06-05 13:58:21,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521495737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:21,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190470158] [2021-06-05 13:58:21,421 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:21,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:21,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190470158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:21,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:21,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:21,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341447006] [2021-06-05 13:58:21,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:21,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:21,481 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:21,597 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-06-05 13:58:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:21,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:21,609 INFO L225 Difference]: With dead ends: 8819 [2021-06-05 13:58:21,609 INFO L226 Difference]: Without dead ends: 8819 [2021-06-05 13:58:21,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-06-05 13:58:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-06-05 13:58:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-06-05 13:58:21,731 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-06-05 13:58:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:21,731 INFO L482 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-06-05 13:58:21,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-06-05 13:58:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:21,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:21,736 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:21,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:21,940 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-06-05 13:58:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:21,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144901263] [2021-06-05 13:58:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:22,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144901263] [2021-06-05 13:58:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144901263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220820516] [2021-06-05 13:58:22,003 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:22,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:22,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:22,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220820516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974777833] [2021-06-05 13:58:22,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:22,104 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:22,233 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-06-05 13:58:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:58:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:22,248 INFO L225 Difference]: With dead ends: 10243 [2021-06-05 13:58:22,248 INFO L226 Difference]: Without dead ends: 10243 [2021-06-05 13:58:22,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-06-05 13:58:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-06-05 13:58:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-06-05 13:58:22,386 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-06-05 13:58:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:22,387 INFO L482 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-06-05 13:58:22,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-06-05 13:58:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:22,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:22,392 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:22,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:22,592 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-06-05 13:58:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:22,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944448005] [2021-06-05 13:58:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:22,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:22,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944448005] [2021-06-05 13:58:22,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944448005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471451329] [2021-06-05 13:58:22,642 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:22,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:22,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:22,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:22,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471451329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:22,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463619762] [2021-06-05 13:58:22,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:22,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:22,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:22,713 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:22,835 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-06-05 13:58:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:22,850 INFO L225 Difference]: With dead ends: 10149 [2021-06-05 13:58:22,850 INFO L226 Difference]: Without dead ends: 10149 [2021-06-05 13:58:22,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-06-05 13:58:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-06-05 13:58:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-06-05 13:58:22,991 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-06-05 13:58:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:22,991 INFO L482 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-06-05 13:58:22,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-06-05 13:58:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:22,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:22,997 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:23,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3103 [2021-06-05 13:58:23,201 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-06-05 13:58:23,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:23,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305719485] [2021-06-05 13:58:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:23,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:23,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305719485] [2021-06-05 13:58:23,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305719485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162044531] [2021-06-05 13:58:23,294 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:23,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:23,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162044531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:23,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:58:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706107759] [2021-06-05 13:58:23,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:23,353 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:23,441 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-06-05 13:58:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:58:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:23,456 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 13:58:23,456 INFO L226 Difference]: Without dead ends: 10072 [2021-06-05 13:58:23,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-06-05 13:58:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-06-05 13:58:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-06-05 13:58:23,598 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-06-05 13:58:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:23,598 INFO L482 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-06-05 13:58:23,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-06-05 13:58:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:23,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:23,603 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3104,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:23,804 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-06-05 13:58:23,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:23,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898282693] [2021-06-05 13:58:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:23,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898282693] [2021-06-05 13:58:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898282693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129711765] [2021-06-05 13:58:23,860 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:23,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129711765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:23,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133993812] [2021-06-05 13:58:23,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:23,922 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:24,089 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-06-05 13:58:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:24,104 INFO L225 Difference]: With dead ends: 10101 [2021-06-05 13:58:24,104 INFO L226 Difference]: Without dead ends: 10101 [2021-06-05 13:58:24,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-05 13:58:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-06-05 13:58:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-06-05 13:58:24,247 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-06-05 13:58:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:24,248 INFO L482 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-06-05 13:58:24,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-06-05 13:58:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:24,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:24,253 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:24,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3105 [2021-06-05 13:58:24,453 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-06-05 13:58:24,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:24,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758623471] [2021-06-05 13:58:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:24,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758623471] [2021-06-05 13:58:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758623471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836653762] [2021-06-05 13:58:24,513 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:24,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:24,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836653762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:24,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:24,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133437660] [2021-06-05 13:58:24,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:24,572 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:24,747 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-06-05 13:58:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:24,758 INFO L225 Difference]: With dead ends: 10116 [2021-06-05 13:58:24,758 INFO L226 Difference]: Without dead ends: 10116 [2021-06-05 13:58:24,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-06-05 13:58:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-06-05 13:58:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-06-05 13:58:24,884 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-06-05 13:58:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:24,884 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-06-05 13:58:24,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-06-05 13:58:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:24,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:24,889 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:25,090 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-06-05 13:58:25,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:25,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385127234] [2021-06-05 13:58:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:25,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385127234] [2021-06-05 13:58:25,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385127234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:25,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533348156] [2021-06-05 13:58:25,161 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:25,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:25,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:25,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:25,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533348156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:25,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:25,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:25,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333087887] [2021-06-05 13:58:25,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:25,221 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:25,424 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-06-05 13:58:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:25,440 INFO L225 Difference]: With dead ends: 10234 [2021-06-05 13:58:25,440 INFO L226 Difference]: Without dead ends: 10234 [2021-06-05 13:58:25,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:58:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-06-05 13:58:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-06-05 13:58:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-06-05 13:58:25,621 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-06-05 13:58:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:25,621 INFO L482 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-06-05 13:58:25,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-06-05 13:58:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:58:25,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:25,626 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:25,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3107,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:25,827 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-06-05 13:58:25,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:25,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107934197] [2021-06-05 13:58:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:25,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:25,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107934197] [2021-06-05 13:58:25,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107934197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:25,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717368216] [2021-06-05 13:58:25,894 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:25,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:25,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717368216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894654150] [2021-06-05 13:58:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:25,957 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:26,202 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-06-05 13:58:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:58:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 13:58:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:26,217 INFO L225 Difference]: With dead ends: 10435 [2021-06-05 13:58:26,217 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 13:58:26,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 13:58:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-06-05 13:58:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-06-05 13:58:26,357 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-06-05 13:58:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:26,357 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-06-05 13:58:26,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-06-05 13:58:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:26,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:26,363 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:26,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3108 [2021-06-05 13:58:26,564 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:26,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-06-05 13:58:26,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890429894] [2021-06-05 13:58:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:26,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:26,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890429894] [2021-06-05 13:58:26,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890429894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:26,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722739371] [2021-06-05 13:58:26,618 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:26,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:26,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722739371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:26,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:26,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:58:26,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473032375] [2021-06-05 13:58:26,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:26,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:26,678 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:26,849 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-06-05 13:58:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:26,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:26,864 INFO L225 Difference]: With dead ends: 10126 [2021-06-05 13:58:26,864 INFO L226 Difference]: Without dead ends: 10123 [2021-06-05 13:58:26,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-06-05 13:58:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-06-05 13:58:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-06-05 13:58:27,010 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-06-05 13:58:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:27,010 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-06-05 13:58:27,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-06-05 13:58:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:27,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:27,016 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:27,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:27,216 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-06-05 13:58:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:27,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018773966] [2021-06-05 13:58:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:27,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:27,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018773966] [2021-06-05 13:58:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018773966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554501734] [2021-06-05 13:58:27,275 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:27,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:58:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554501734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:27,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139628518] [2021-06-05 13:58:27,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:27,335 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:27,489 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-06-05 13:58:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:27,503 INFO L225 Difference]: With dead ends: 10176 [2021-06-05 13:58:27,503 INFO L226 Difference]: Without dead ends: 10172 [2021-06-05 13:58:27,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-06-05 13:58:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-06-05 13:58:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-06-05 13:58:27,641 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-06-05 13:58:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:27,641 INFO L482 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-06-05 13:58:27,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-06-05 13:58:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:27,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:27,647 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:27,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-06-05 13:58:27,847 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-06-05 13:58:27,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:27,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787424269] [2021-06-05 13:58:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:27,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787424269] [2021-06-05 13:58:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787424269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54202165] [2021-06-05 13:58:27,908 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:27,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:58:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:27,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54202165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:27,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:27,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015321950] [2021-06-05 13:58:27,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:27,973 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:28,160 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-06-05 13:58:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:58:28,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:28,175 INFO L225 Difference]: With dead ends: 10153 [2021-06-05 13:58:28,175 INFO L226 Difference]: Without dead ends: 10148 [2021-06-05 13:58:28,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-06-05 13:58:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-06-05 13:58:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-06-05 13:58:28,371 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-06-05 13:58:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:28,371 INFO L482 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-06-05 13:58:28,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-06-05 13:58:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:28,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:28,376 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:28,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-06-05 13:58:28,593 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-06-05 13:58:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:28,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316773676] [2021-06-05 13:58:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:28,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:28,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316773676] [2021-06-05 13:58:28,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316773676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:28,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008835287] [2021-06-05 13:58:28,641 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:28,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008835287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:28,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:28,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25952152] [2021-06-05 13:58:28,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:28,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:28,700 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:28,796 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-06-05 13:58:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:28,811 INFO L225 Difference]: With dead ends: 10154 [2021-06-05 13:58:28,811 INFO L226 Difference]: Without dead ends: 10152 [2021-06-05 13:58:28,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-06-05 13:58:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-06-05 13:58:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-06-05 13:58:28,961 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-06-05 13:58:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:28,961 INFO L482 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-06-05 13:58:28,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-06-05 13:58:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:28,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:28,967 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:29,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3112,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:29,183 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-06-05 13:58:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:29,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405570254] [2021-06-05 13:58:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:29,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:29,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405570254] [2021-06-05 13:58:29,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405570254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:29,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449695650] [2021-06-05 13:58:29,232 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:29,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:29,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:29,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:29,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449695650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:29,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:29,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:58:29,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006198550] [2021-06-05 13:58:29,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:29,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:29,290 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:29,405 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-06-05 13:58:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:29,420 INFO L225 Difference]: With dead ends: 10120 [2021-06-05 13:58:29,421 INFO L226 Difference]: Without dead ends: 10120 [2021-06-05 13:58:29,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-06-05 13:58:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-06-05 13:58:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-06-05 13:58:29,557 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-06-05 13:58:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:29,557 INFO L482 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-06-05 13:58:29,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-06-05 13:58:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:29,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:29,562 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:29,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3113,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:29,763 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-06-05 13:58:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:29,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127999840] [2021-06-05 13:58:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:29,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:29,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127999840] [2021-06-05 13:58:29,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127999840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:29,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505057048] [2021-06-05 13:58:29,882 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:29,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:29,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:29,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505057048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:29,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:29,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:29,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744585450] [2021-06-05 13:58:29,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:29,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:29,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:29,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:29,960 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:30,109 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-06-05 13:58:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:30,124 INFO L225 Difference]: With dead ends: 10112 [2021-06-05 13:58:30,125 INFO L226 Difference]: Without dead ends: 10109 [2021-06-05 13:58:30,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-06-05 13:58:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-06-05 13:58:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-06-05 13:58:30,268 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-06-05 13:58:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:30,268 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-06-05 13:58:30,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-06-05 13:58:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:30,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:30,273 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:30,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:30,474 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-06-05 13:58:30,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:30,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893366228] [2021-06-05 13:58:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:30,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893366228] [2021-06-05 13:58:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893366228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68797781] [2021-06-05 13:58:30,532 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:30,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:30,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68797781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:30,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:30,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659215009] [2021-06-05 13:58:30,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:30,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:30,584 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:30,744 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-06-05 13:58:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:30,759 INFO L225 Difference]: With dead ends: 10108 [2021-06-05 13:58:30,759 INFO L226 Difference]: Without dead ends: 10105 [2021-06-05 13:58:30,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-06-05 13:58:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-06-05 13:58:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-06-05 13:58:30,919 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-06-05 13:58:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:30,920 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-06-05 13:58:30,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-06-05 13:58:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:30,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:30,925 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:31,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:31,126 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-06-05 13:58:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:31,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992286755] [2021-06-05 13:58:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:31,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992286755] [2021-06-05 13:58:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992286755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77015953] [2021-06-05 13:58:31,188 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:31,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:58:31,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:31,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77015953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:31,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:31,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:31,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940558702] [2021-06-05 13:58:31,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:31,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:31,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:31,245 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:31,412 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-06-05 13:58:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:31,426 INFO L225 Difference]: With dead ends: 10188 [2021-06-05 13:58:31,426 INFO L226 Difference]: Without dead ends: 10184 [2021-06-05 13:58:31,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-06-05 13:58:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-06-05 13:58:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-06-05 13:58:31,567 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-06-05 13:58:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:31,567 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-06-05 13:58:31,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-06-05 13:58:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:31,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:31,572 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:31,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:31,773 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-06-05 13:58:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395155882] [2021-06-05 13:58:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:31,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:31,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395155882] [2021-06-05 13:58:31,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395155882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:31,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883801127] [2021-06-05 13:58:31,836 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:31,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:31,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:31,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:31,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883801127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:31,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:31,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:58:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657468724] [2021-06-05 13:58:31,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:31,891 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:32,054 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-06-05 13:58:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:58:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:32,068 INFO L225 Difference]: With dead ends: 10178 [2021-06-05 13:58:32,068 INFO L226 Difference]: Without dead ends: 10173 [2021-06-05 13:58:32,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-06-05 13:58:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-06-05 13:58:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-06-05 13:58:32,191 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-06-05 13:58:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:32,191 INFO L482 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-06-05 13:58:32,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-06-05 13:58:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:32,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:32,196 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:32,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3117 [2021-06-05 13:58:32,396 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-06-05 13:58:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238856603] [2021-06-05 13:58:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:32,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238856603] [2021-06-05 13:58:32,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238856603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:32,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282341532] [2021-06-05 13:58:32,463 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282341532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:32,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:32,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626657534] [2021-06-05 13:58:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:32,514 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:32,703 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-06-05 13:58:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:32,718 INFO L225 Difference]: With dead ends: 10151 [2021-06-05 13:58:32,718 INFO L226 Difference]: Without dead ends: 10145 [2021-06-05 13:58:32,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-06-05 13:58:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-06-05 13:58:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-06-05 13:58:32,861 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-06-05 13:58:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:32,861 INFO L482 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-06-05 13:58:32,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-06-05 13:58:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:32,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:32,867 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:33,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:33,067 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-06-05 13:58:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:33,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617290200] [2021-06-05 13:58:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:33,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617290200] [2021-06-05 13:58:33,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617290200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:33,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928005512] [2021-06-05 13:58:33,111 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:33,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:58:33,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928005512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:33,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:33,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:58:33,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000022392] [2021-06-05 13:58:33,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:58:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:58:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:58:33,169 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:33,298 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-06-05 13:58:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:33,311 INFO L225 Difference]: With dead ends: 10106 [2021-06-05 13:58:33,311 INFO L226 Difference]: Without dead ends: 10106 [2021-06-05 13:58:33,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-06-05 13:58:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-06-05 13:58:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-06-05 13:58:33,439 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-06-05 13:58:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:33,439 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-06-05 13:58:33,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-06-05 13:58:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:33,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:33,445 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:33,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:33,646 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-06-05 13:58:33,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:33,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030080197] [2021-06-05 13:58:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:33,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030080197] [2021-06-05 13:58:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030080197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522778239] [2021-06-05 13:58:33,701 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:33,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522778239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:33,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:33,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:33,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532570118] [2021-06-05 13:58:33,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:33,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:33,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:33,760 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:33,909 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-06-05 13:58:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:33,933 INFO L225 Difference]: With dead ends: 10155 [2021-06-05 13:58:33,933 INFO L226 Difference]: Without dead ends: 10151 [2021-06-05 13:58:33,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:58:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-06-05 13:58:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-06-05 13:58:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-06-05 13:58:34,079 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-06-05 13:58:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:34,092 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-06-05 13:58:34,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-06-05 13:58:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:34,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:34,098 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:34,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-06-05 13:58:34,309 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-06-05 13:58:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607046503] [2021-06-05 13:58:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607046503] [2021-06-05 13:58:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607046503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128554261] [2021-06-05 13:58:34,362 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:34,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:34,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128554261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:34,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:34,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:58:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462337046] [2021-06-05 13:58:34,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:34,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:34,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:34,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:34,413 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:34,582 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-06-05 13:58:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:34,597 INFO L225 Difference]: With dead ends: 10215 [2021-06-05 13:58:34,598 INFO L226 Difference]: Without dead ends: 10211 [2021-06-05 13:58:34,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-06-05 13:58:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-06-05 13:58:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-06-05 13:58:34,742 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-06-05 13:58:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:34,742 INFO L482 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-06-05 13:58:34,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-06-05 13:58:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:34,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:34,748 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:34,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3121 [2021-06-05 13:58:34,948 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-06-05 13:58:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:34,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222607838] [2021-06-05 13:58:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:35,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222607838] [2021-06-05 13:58:35,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222607838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816324648] [2021-06-05 13:58:35,022 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:35,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:35,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:35,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816324648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:35,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:35,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:35,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529463366] [2021-06-05 13:58:35,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:35,077 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:35,236 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-06-05 13:58:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:35,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:35,250 INFO L225 Difference]: With dead ends: 10242 [2021-06-05 13:58:35,251 INFO L226 Difference]: Without dead ends: 10237 [2021-06-05 13:58:35,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:58:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-06-05 13:58:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-06-05 13:58:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-06-05 13:58:35,390 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-06-05 13:58:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:35,390 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-06-05 13:58:35,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-06-05 13:58:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:35,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:35,396 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:35,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-05 13:58:35,597 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-06-05 13:58:35,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:35,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934174886] [2021-06-05 13:58:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:35,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:35,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934174886] [2021-06-05 13:58:35,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934174886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:35,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964627939] [2021-06-05 13:58:35,656 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:35,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:35,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:35,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964627939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:35,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:35,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:58:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436558026] [2021-06-05 13:58:35,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:35,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:35,714 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:35,926 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-06-05 13:58:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:35,938 INFO L225 Difference]: With dead ends: 10254 [2021-06-05 13:58:35,938 INFO L226 Difference]: Without dead ends: 10250 [2021-06-05 13:58:35,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-06-05 13:58:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-06-05 13:58:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-06-05 13:58:36,107 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-06-05 13:58:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:36,107 INFO L482 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-06-05 13:58:36,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-06-05 13:58:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:36,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:36,113 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:36,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:36,329 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-06-05 13:58:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:36,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956419313] [2021-06-05 13:58:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:36,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:36,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956419313] [2021-06-05 13:58:36,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956419313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:36,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966914786] [2021-06-05 13:58:36,421 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:36,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966914786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:36,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:36,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:36,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851970340] [2021-06-05 13:58:36,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:36,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:36,486 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:36,657 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-06-05 13:58:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:36,673 INFO L225 Difference]: With dead ends: 10346 [2021-06-05 13:58:36,673 INFO L226 Difference]: Without dead ends: 10341 [2021-06-05 13:58:36,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-06-05 13:58:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-06-05 13:58:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-06-05 13:58:36,826 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-06-05 13:58:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:36,826 INFO L482 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-06-05 13:58:36,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-06-05 13:58:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:36,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:36,832 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:37,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,032 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-06-05 13:58:37,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:37,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940273197] [2021-06-05 13:58:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:37,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940273197] [2021-06-05 13:58:37,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940273197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157724578] [2021-06-05 13:58:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:37,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:37,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157724578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:37,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:37,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210508753] [2021-06-05 13:58:37,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:37,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:37,164 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:37,345 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-06-05 13:58:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:58:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:37,360 INFO L225 Difference]: With dead ends: 10320 [2021-06-05 13:58:37,360 INFO L226 Difference]: Without dead ends: 10314 [2021-06-05 13:58:37,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-06-05 13:58:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-06-05 13:58:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-06-05 13:58:37,510 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-06-05 13:58:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:37,510 INFO L482 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-06-05 13:58:37,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-06-05 13:58:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:37,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:37,516 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:37,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,732 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-06-05 13:58:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410929565] [2021-06-05 13:58:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:37,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:37,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410929565] [2021-06-05 13:58:37,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410929565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520401504] [2021-06-05 13:58:37,779 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:37,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520401504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:37,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:37,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826187106] [2021-06-05 13:58:37,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:37,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:37,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:37,840 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:37,925 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-06-05 13:58:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:37,940 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 13:58:37,941 INFO L226 Difference]: Without dead ends: 10199 [2021-06-05 13:58:37,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-06-05 13:58:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-06-05 13:58:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-06-05 13:58:38,083 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-06-05 13:58:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:38,084 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-06-05 13:58:38,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-06-05 13:58:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:38,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:38,089 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:38,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:38,289 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-06-05 13:58:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140659563] [2021-06-05 13:58:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140659563] [2021-06-05 13:58:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140659563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423857687] [2021-06-05 13:58:38,336 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:38,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:38,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:38,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423857687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:58:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048629838] [2021-06-05 13:58:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:38,396 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:38,511 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-06-05 13:58:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:38,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:38,526 INFO L225 Difference]: With dead ends: 10191 [2021-06-05 13:58:38,527 INFO L226 Difference]: Without dead ends: 10191 [2021-06-05 13:58:38,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-06-05 13:58:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-06-05 13:58:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-06-05 13:58:38,670 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-06-05 13:58:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:38,670 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-06-05 13:58:38,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-06-05 13:58:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:38,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:38,676 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:38,877 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-06-05 13:58:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:38,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177200255] [2021-06-05 13:58:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:38,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:38,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177200255] [2021-06-05 13:58:38,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177200255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:38,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604773105] [2021-06-05 13:58:38,935 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:38,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:58:38,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:38,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604773105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:38,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:38,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:58:38,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930135314] [2021-06-05 13:58:38,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:38,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:38,992 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:39,141 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-06-05 13:58:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:39,153 INFO L225 Difference]: With dead ends: 10188 [2021-06-05 13:58:39,153 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 13:58:39,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 13:58:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-06-05 13:58:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-06-05 13:58:39,278 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-06-05 13:58:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:39,278 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-06-05 13:58:39,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-06-05 13:58:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:39,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:39,284 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:39,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:39,485 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-06-05 13:58:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:39,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956771836] [2021-06-05 13:58:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:39,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956771836] [2021-06-05 13:58:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956771836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064791632] [2021-06-05 13:58:39,538 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:39,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:58:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064791632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:39,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:39,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:39,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131835582] [2021-06-05 13:58:39,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:39,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:39,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:39,598 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:39,770 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-06-05 13:58:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:39,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:39,786 INFO L225 Difference]: With dead ends: 10193 [2021-06-05 13:58:39,786 INFO L226 Difference]: Without dead ends: 10190 [2021-06-05 13:58:39,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-06-05 13:58:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-06-05 13:58:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-06-05 13:58:39,932 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-06-05 13:58:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:39,932 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-06-05 13:58:39,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-06-05 13:58:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:39,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:39,938 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:40,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3129 [2021-06-05 13:58:40,138 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:40,138 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-06-05 13:58:40,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:40,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144449545] [2021-06-05 13:58:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144449545] [2021-06-05 13:58:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144449545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815757273] [2021-06-05 13:58:40,204 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:40,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815757273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:40,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:40,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:40,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887042183] [2021-06-05 13:58:40,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:40,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:40,262 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:40,452 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-06-05 13:58:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:40,466 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 13:58:40,466 INFO L226 Difference]: Without dead ends: 10195 [2021-06-05 13:58:40,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-06-05 13:58:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-06-05 13:58:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-06-05 13:58:40,611 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-06-05 13:58:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:40,611 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-06-05 13:58:40,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-06-05 13:58:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:40,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:40,616 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:40,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-06-05 13:58:40,817 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-06-05 13:58:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:40,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090997268] [2021-06-05 13:58:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:40,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090997268] [2021-06-05 13:58:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090997268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099249762] [2021-06-05 13:58:40,878 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:40,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:40,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:40,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099249762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:40,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:40,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289435739] [2021-06-05 13:58:40,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:40,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:40,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:40,976 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:41,163 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-06-05 13:58:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:41,178 INFO L225 Difference]: With dead ends: 10440 [2021-06-05 13:58:41,178 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 13:58:41,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 13:58:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-06-05 13:58:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-06-05 13:58:41,327 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-06-05 13:58:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:41,327 INFO L482 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-06-05 13:58:41,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-06-05 13:58:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:41,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:41,333 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:41,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3131 [2021-06-05 13:58:41,549 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-06-05 13:58:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:41,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152616818] [2021-06-05 13:58:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:41,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152616818] [2021-06-05 13:58:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152616818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256415076] [2021-06-05 13:58:41,614 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:41,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:41,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:41,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256415076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:58:41,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462202790] [2021-06-05 13:58:41,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:41,674 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:41,865 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-06-05 13:58:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:41,881 INFO L225 Difference]: With dead ends: 10434 [2021-06-05 13:58:41,881 INFO L226 Difference]: Without dead ends: 10428 [2021-06-05 13:58:41,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-06-05 13:58:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-06-05 13:58:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-06-05 13:58:42,027 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-06-05 13:58:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-06-05 13:58:42,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-06-05 13:58:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:42,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:42,033 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:42,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-05 13:58:42,233 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-06-05 13:58:42,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:42,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491888636] [2021-06-05 13:58:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:42,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:42,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491888636] [2021-06-05 13:58:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491888636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:42,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061820948] [2021-06-05 13:58:42,304 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:42,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:42,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061820948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:42,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:42,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67255270] [2021-06-05 13:58:42,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:42,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:42,363 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:42,554 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-06-05 13:58:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:42,568 INFO L225 Difference]: With dead ends: 10403 [2021-06-05 13:58:42,568 INFO L226 Difference]: Without dead ends: 10396 [2021-06-05 13:58:42,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-06-05 13:58:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-06-05 13:58:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-06-05 13:58:42,713 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-06-05 13:58:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:42,713 INFO L482 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-06-05 13:58:42,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-06-05 13:58:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:42,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:42,719 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:42,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3133 [2021-06-05 13:58:42,919 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-06-05 13:58:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:42,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144605349] [2021-06-05 13:58:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:42,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:42,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144605349] [2021-06-05 13:58:42,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144605349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:42,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863034452] [2021-06-05 13:58:42,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:42,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:42,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:58:43,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863034452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:43,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:43,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 13:58:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278721067] [2021-06-05 13:58:43,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:43,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:43,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:43,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:43,044 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:58:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:43,174 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-06-05 13:58:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:58:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-06-05 13:58:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:43,190 INFO L225 Difference]: With dead ends: 10268 [2021-06-05 13:58:43,190 INFO L226 Difference]: Without dead ends: 10268 [2021-06-05 13:58:43,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-06-05 13:58:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-06-05 13:58:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-06-05 13:58:43,371 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-06-05 13:58:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:43,371 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-06-05 13:58:43,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:58:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-06-05 13:58:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:43,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:43,377 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:43,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:43,578 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-06-05 13:58:43,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:43,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325805454] [2021-06-05 13:58:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:43,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:43,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325805454] [2021-06-05 13:58:43,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325805454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:43,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892951543] [2021-06-05 13:58:43,639 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:43,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:43,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892951543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:43,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:43,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:58:43,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314016054] [2021-06-05 13:58:43,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:43,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:43,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:43,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:43,707 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:43,857 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-06-05 13:58:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:43,873 INFO L225 Difference]: With dead ends: 10257 [2021-06-05 13:58:43,874 INFO L226 Difference]: Without dead ends: 10252 [2021-06-05 13:58:43,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-06-05 13:58:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-06-05 13:58:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-06-05 13:58:44,048 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-06-05 13:58:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:44,048 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-06-05 13:58:44,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-06-05 13:58:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:44,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:44,054 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:44,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:44,254 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-06-05 13:58:44,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:44,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670644916] [2021-06-05 13:58:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:44,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:44,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670644916] [2021-06-05 13:58:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670644916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:44,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429749361] [2021-06-05 13:58:44,320 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:44,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429749361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:44,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:44,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70444871] [2021-06-05 13:58:44,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:44,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:44,384 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:44,555 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-06-05 13:58:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:58:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:44,571 INFO L225 Difference]: With dead ends: 10339 [2021-06-05 13:58:44,571 INFO L226 Difference]: Without dead ends: 10334 [2021-06-05 13:58:44,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-06-05 13:58:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-06-05 13:58:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-06-05 13:58:44,722 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-06-05 13:58:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:44,722 INFO L482 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-06-05 13:58:44,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-06-05 13:58:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:44,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:44,728 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:44,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3136 [2021-06-05 13:58:44,929 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-06-05 13:58:44,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:44,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932734063] [2021-06-05 13:58:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:44,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932734063] [2021-06-05 13:58:44,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932734063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:44,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054115071] [2021-06-05 13:58:44,991 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:45,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:45,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:45,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054115071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:45,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:45,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317841272] [2021-06-05 13:58:45,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:45,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:45,046 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:45,233 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-06-05 13:58:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:45,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:45,249 INFO L225 Difference]: With dead ends: 10400 [2021-06-05 13:58:45,249 INFO L226 Difference]: Without dead ends: 10394 [2021-06-05 13:58:45,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-06-05 13:58:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-06-05 13:58:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-06-05 13:58:45,387 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-06-05 13:58:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:45,388 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-06-05 13:58:45,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-06-05 13:58:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:45,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:45,393 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:45,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3137,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:45,593 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-06-05 13:58:45,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:45,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991393836] [2021-06-05 13:58:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:45,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:45,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991393836] [2021-06-05 13:58:45,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991393836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:45,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243962834] [2021-06-05 13:58:45,655 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:45,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243962834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:45,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:45,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:58:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402472383] [2021-06-05 13:58:45,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:45,728 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:45,907 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-06-05 13:58:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:45,922 INFO L225 Difference]: With dead ends: 10336 [2021-06-05 13:58:45,923 INFO L226 Difference]: Without dead ends: 10331 [2021-06-05 13:58:45,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-06-05 13:58:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-06-05 13:58:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-06-05 13:58:46,073 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-06-05 13:58:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:46,073 INFO L482 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-06-05 13:58:46,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-06-05 13:58:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:46,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:46,079 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:46,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3138 [2021-06-05 13:58:46,280 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-06-05 13:58:46,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:46,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580866362] [2021-06-05 13:58:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:46,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580866362] [2021-06-05 13:58:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580866362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980933342] [2021-06-05 13:58:46,342 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:46,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:46,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980933342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017386381] [2021-06-05 13:58:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:46,400 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:46,618 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-06-05 13:58:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:46,633 INFO L225 Difference]: With dead ends: 10532 [2021-06-05 13:58:46,633 INFO L226 Difference]: Without dead ends: 10526 [2021-06-05 13:58:46,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-06-05 13:58:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-06-05 13:58:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-06-05 13:58:46,783 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-06-05 13:58:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:46,783 INFO L482 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-06-05 13:58:46,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-06-05 13:58:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:46,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:46,789 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:46,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3139,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:46,989 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-06-05 13:58:46,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:46,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918382273] [2021-06-05 13:58:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:47,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:47,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918382273] [2021-06-05 13:58:47,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918382273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:47,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609841097] [2021-06-05 13:58:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:47,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:47,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609841097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:47,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:47,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435630569] [2021-06-05 13:58:47,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:47,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:47,123 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:47,311 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-06-05 13:58:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:47,327 INFO L225 Difference]: With dead ends: 10492 [2021-06-05 13:58:47,327 INFO L226 Difference]: Without dead ends: 10485 [2021-06-05 13:58:47,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-06-05 13:58:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-06-05 13:58:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-06-05 13:58:47,482 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-06-05 13:58:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:47,482 INFO L482 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-06-05 13:58:47,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-06-05 13:58:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:47,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:47,488 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:47,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3140,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:47,689 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-06-05 13:58:47,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:47,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858919758] [2021-06-05 13:58:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:47,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858919758] [2021-06-05 13:58:47,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858919758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326355185] [2021-06-05 13:58:47,736 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:47,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:47,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326355185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:47,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:47,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200339171] [2021-06-05 13:58:47,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:47,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:47,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:47,795 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:47,871 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-06-05 13:58:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:47,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:47,883 INFO L225 Difference]: With dead ends: 10308 [2021-06-05 13:58:47,884 INFO L226 Difference]: Without dead ends: 10308 [2021-06-05 13:58:47,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-06-05 13:58:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-06-05 13:58:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-06-05 13:58:48,010 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-06-05 13:58:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:48,010 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-06-05 13:58:48,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-06-05 13:58:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:48,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:48,016 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:48,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3141 [2021-06-05 13:58:48,216 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-06-05 13:58:48,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:48,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980808618] [2021-06-05 13:58:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:48,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980808618] [2021-06-05 13:58:48,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980808618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290523911] [2021-06-05 13:58:48,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:48,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:48,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290523911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:48,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:48,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:58:48,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286650821] [2021-06-05 13:58:48,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:48,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:48,319 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:48,410 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-06-05 13:58:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:48,426 INFO L225 Difference]: With dead ends: 10304 [2021-06-05 13:58:48,426 INFO L226 Difference]: Without dead ends: 10304 [2021-06-05 13:58:48,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-06-05 13:58:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-06-05 13:58:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-06-05 13:58:48,576 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-06-05 13:58:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:48,576 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-06-05 13:58:48,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-06-05 13:58:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:48,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:48,583 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:48,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:48,793 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-06-05 13:58:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:48,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602476973] [2021-06-05 13:58:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:48,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602476973] [2021-06-05 13:58:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602476973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:48,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800468275] [2021-06-05 13:58:48,844 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:48,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:48,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:48,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:48,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:48,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800468275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:48,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:48,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:58:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596191193] [2021-06-05 13:58:48,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:48,905 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:49,056 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-06-05 13:58:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:49,069 INFO L225 Difference]: With dead ends: 10301 [2021-06-05 13:58:49,069 INFO L226 Difference]: Without dead ends: 10299 [2021-06-05 13:58:49,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-06-05 13:58:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-06-05 13:58:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-06-05 13:58:49,268 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-06-05 13:58:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:49,268 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-06-05 13:58:49,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-06-05 13:58:49,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:49,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:49,274 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:49,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 13:58:49,485 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-06-05 13:58:49,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:49,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923577062] [2021-06-05 13:58:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:49,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923577062] [2021-06-05 13:58:49,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923577062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:49,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386211315] [2021-06-05 13:58:49,538 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:49,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:49,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:49,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:49,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386211315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:49,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:49,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:58:49,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472986314] [2021-06-05 13:58:49,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:49,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:49,599 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:49,769 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-06-05 13:58:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:58:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:49,783 INFO L225 Difference]: With dead ends: 10306 [2021-06-05 13:58:49,783 INFO L226 Difference]: Without dead ends: 10303 [2021-06-05 13:58:49,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-06-05 13:58:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-06-05 13:58:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-06-05 13:58:49,921 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-06-05 13:58:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:49,921 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-06-05 13:58:49,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-06-05 13:58:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:49,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:49,927 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:50,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-06-05 13:58:50,128 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-06-05 13:58:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:50,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978420229] [2021-06-05 13:58:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:50,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978420229] [2021-06-05 13:58:50,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978420229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36499786] [2021-06-05 13:58:50,183 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:50,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:50,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36499786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:50,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:58:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122193577] [2021-06-05 13:58:50,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:50,240 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:50,387 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-06-05 13:58:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:50,404 INFO L225 Difference]: With dead ends: 11212 [2021-06-05 13:58:50,404 INFO L226 Difference]: Without dead ends: 11208 [2021-06-05 13:58:50,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-06-05 13:58:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-06-05 13:58:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-06-05 13:58:50,556 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-06-05 13:58:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:50,556 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-06-05 13:58:50,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-06-05 13:58:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:50,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:50,562 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:50,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3145,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:50,763 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:50,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-06-05 13:58:50,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:50,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631266737] [2021-06-05 13:58:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:50,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:50,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631266737] [2021-06-05 13:58:50,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631266737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631938081] [2021-06-05 13:58:50,824 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:50,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631938081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:50,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:50,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157430954] [2021-06-05 13:58:50,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:50,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:50,885 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:51,050 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-06-05 13:58:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:51,068 INFO L225 Difference]: With dead ends: 11223 [2021-06-05 13:58:51,068 INFO L226 Difference]: Without dead ends: 11218 [2021-06-05 13:58:51,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-06-05 13:58:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-06-05 13:58:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-06-05 13:58:51,220 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-06-05 13:58:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:51,220 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-06-05 13:58:51,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-06-05 13:58:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:51,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:51,226 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:51,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:51,426 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-06-05 13:58:51,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:51,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324106916] [2021-06-05 13:58:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:51,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:51,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324106916] [2021-06-05 13:58:51,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324106916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:51,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095701816] [2021-06-05 13:58:51,489 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:51,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:51,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:51,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095701816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:51,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:51,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073196051] [2021-06-05 13:58:51,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:51,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:51,548 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:51,685 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-06-05 13:58:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:51,699 INFO L225 Difference]: With dead ends: 10405 [2021-06-05 13:58:51,699 INFO L226 Difference]: Without dead ends: 10400 [2021-06-05 13:58:51,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-06-05 13:58:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-06-05 13:58:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-06-05 13:58:51,843 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-06-05 13:58:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:51,843 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-06-05 13:58:51,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:51,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-06-05 13:58:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:51,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:51,849 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:52,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3147,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:52,050 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-06-05 13:58:52,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:52,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733628688] [2021-06-05 13:58:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:52,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733628688] [2021-06-05 13:58:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733628688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:52,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172464609] [2021-06-05 13:58:52,116 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:52,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172464609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:52,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:52,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415652008] [2021-06-05 13:58:52,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:52,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:52,174 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:52,345 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-06-05 13:58:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:52,358 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 13:58:52,359 INFO L226 Difference]: Without dead ends: 10376 [2021-06-05 13:58:52,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-06-05 13:58:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-06-05 13:58:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-06-05 13:58:52,491 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-06-05 13:58:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:52,491 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-06-05 13:58:52,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-06-05 13:58:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:52,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:52,496 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:52,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3148 [2021-06-05 13:58:52,705 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-06-05 13:58:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203137036] [2021-06-05 13:58:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:52,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203137036] [2021-06-05 13:58:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203137036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050658501] [2021-06-05 13:58:52,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:52,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:52,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:52,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050658501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:52,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:52,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724319615] [2021-06-05 13:58:52,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:52,845 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:52,982 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-06-05 13:58:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:58:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:52,995 INFO L225 Difference]: With dead ends: 10354 [2021-06-05 13:58:52,996 INFO L226 Difference]: Without dead ends: 10347 [2021-06-05 13:58:52,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-06-05 13:58:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-06-05 13:58:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-06-05 13:58:53,136 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-06-05 13:58:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:53,136 INFO L482 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-06-05 13:58:53,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-06-05 13:58:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:53,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:53,143 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:53,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:53,343 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-06-05 13:58:53,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:53,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009738594] [2021-06-05 13:58:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:53,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:53,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009738594] [2021-06-05 13:58:53,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009738594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:53,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623393492] [2021-06-05 13:58:53,400 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:53,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623393492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:53,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:53,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:53,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095797331] [2021-06-05 13:58:53,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:53,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:53,459 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:53,576 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-06-05 13:58:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:53,592 INFO L225 Difference]: With dead ends: 10360 [2021-06-05 13:58:53,592 INFO L226 Difference]: Without dead ends: 10360 [2021-06-05 13:58:53,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-06-05 13:58:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-06-05 13:58:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-06-05 13:58:53,751 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-06-05 13:58:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-06-05 13:58:53,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-06-05 13:58:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:53,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:53,757 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:53,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-05 13:58:53,957 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-06-05 13:58:53,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:53,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524181386] [2021-06-05 13:58:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:54,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:54,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524181386] [2021-06-05 13:58:54,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524181386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:54,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603815827] [2021-06-05 13:58:54,019 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:54,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:54,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603815827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:54,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:54,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:58:54,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946141871] [2021-06-05 13:58:54,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:54,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:54,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:54,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:54,070 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:54,220 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-06-05 13:58:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:54,235 INFO L225 Difference]: With dead ends: 10425 [2021-06-05 13:58:54,235 INFO L226 Difference]: Without dead ends: 10419 [2021-06-05 13:58:54,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-06-05 13:58:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-06-05 13:58:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-06-05 13:58:54,378 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-06-05 13:58:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:54,378 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-06-05 13:58:54,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-06-05 13:58:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:54,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:54,385 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:54,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 13:58:54,586 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-06-05 13:58:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:54,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141736665] [2021-06-05 13:58:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:54,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:54,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141736665] [2021-06-05 13:58:54,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141736665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:54,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462474728] [2021-06-05 13:58:54,652 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:54,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:58:54,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:54,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462474728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:54,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:54,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:58:54,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517273593] [2021-06-05 13:58:54,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:54,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:54,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:54,720 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:54,888 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-06-05 13:58:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:54,902 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 13:58:54,902 INFO L226 Difference]: Without dead ends: 10519 [2021-06-05 13:58:54,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-06-05 13:58:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-06-05 13:58:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-06-05 13:58:55,033 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-06-05 13:58:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:55,033 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-06-05 13:58:55,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-06-05 13:58:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:55,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:55,039 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:55,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3152,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:55,239 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:55,240 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-06-05 13:58:55,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:55,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893858097] [2021-06-05 13:58:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893858097] [2021-06-05 13:58:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893858097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157551485] [2021-06-05 13:58:55,351 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:55,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:55,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:55,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157551485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:55,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:55,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:55,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276366894] [2021-06-05 13:58:55,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:55,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:55,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:55,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:55,411 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:55,621 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-06-05 13:58:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:55,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:55,636 INFO L225 Difference]: With dead ends: 10675 [2021-06-05 13:58:55,636 INFO L226 Difference]: Without dead ends: 10668 [2021-06-05 13:58:55,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:58:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-06-05 13:58:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-06-05 13:58:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-06-05 13:58:55,789 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-06-05 13:58:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:55,789 INFO L482 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-06-05 13:58:55,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-06-05 13:58:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:55,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:55,795 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:55,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 13:58:55,996 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:55,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-06-05 13:58:55,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:55,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083886791] [2021-06-05 13:58:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:56,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:56,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083886791] [2021-06-05 13:58:56,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083886791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560717970] [2021-06-05 13:58:56,057 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560717970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:56,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147185073] [2021-06-05 13:58:56,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:56,115 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:56,273 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-06-05 13:58:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:58:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:56,290 INFO L225 Difference]: With dead ends: 10950 [2021-06-05 13:58:56,290 INFO L226 Difference]: Without dead ends: 10944 [2021-06-05 13:58:56,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-06-05 13:58:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-06-05 13:58:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-06-05 13:58:56,450 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-06-05 13:58:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:56,450 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-06-05 13:58:56,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-06-05 13:58:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:56,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:56,456 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:56,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-05 13:58:56,657 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-06-05 13:58:56,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:56,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606120986] [2021-06-05 13:58:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:56,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:56,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606120986] [2021-06-05 13:58:56,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606120986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793702252] [2021-06-05 13:58:56,721 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:56,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793702252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:56,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:58:56,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149183605] [2021-06-05 13:58:56,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:56,782 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:56,930 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-06-05 13:58:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:58:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:56,944 INFO L225 Difference]: With dead ends: 10448 [2021-06-05 13:58:56,944 INFO L226 Difference]: Without dead ends: 10442 [2021-06-05 13:58:56,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-06-05 13:58:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-06-05 13:58:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-06-05 13:58:57,065 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-06-05 13:58:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:57,065 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-06-05 13:58:57,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-06-05 13:58:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:57,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:57,071 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:57,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-05 13:58:57,271 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-06-05 13:58:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:57,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959571681] [2021-06-05 13:58:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:57,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959571681] [2021-06-05 13:58:57,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959571681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6169677] [2021-06-05 13:58:57,342 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:57,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:57,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6169677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:57,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:57,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:58:57,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510935374] [2021-06-05 13:58:57,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:58:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:58:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:58:57,405 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:57,569 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-06-05 13:58:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:57,585 INFO L225 Difference]: With dead ends: 10417 [2021-06-05 13:58:57,585 INFO L226 Difference]: Without dead ends: 10410 [2021-06-05 13:58:57,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:58:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-06-05 13:58:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-06-05 13:58:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-06-05 13:58:57,730 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-06-05 13:58:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:57,731 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-06-05 13:58:57,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-06-05 13:58:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:57,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:57,737 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:57,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:57,937 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-06-05 13:58:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:57,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280493934] [2021-06-05 13:58:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:57,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:57,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280493934] [2021-06-05 13:58:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280493934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:57,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144136154] [2021-06-05 13:58:57,988 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:58,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144136154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:58:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93680260] [2021-06-05 13:58:58,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:58:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:58:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:58:58,045 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:58,132 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-06-05 13:58:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:58:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:58,147 INFO L225 Difference]: With dead ends: 10562 [2021-06-05 13:58:58,147 INFO L226 Difference]: Without dead ends: 10562 [2021-06-05 13:58:58,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-06-05 13:58:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-06-05 13:58:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-06-05 13:58:58,310 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-06-05 13:58:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:58,310 INFO L482 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-06-05 13:58:58,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-06-05 13:58:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:58,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:58,316 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:58,517 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-06-05 13:58:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:58,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040639937] [2021-06-05 13:58:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040639937] [2021-06-05 13:58:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040639937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497945939] [2021-06-05 13:58:58,567 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:58,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:58:58,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:58:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497945939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:58,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:58,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:58:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990418423] [2021-06-05 13:58:58,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:58,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:58,626 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:58,718 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-06-05 13:58:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:58:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:58,735 INFO L225 Difference]: With dead ends: 10501 [2021-06-05 13:58:58,735 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 13:58:58,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 13:58:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-06-05 13:58:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-06-05 13:58:58,891 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-06-05 13:58:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:58,892 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-06-05 13:58:58,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-06-05 13:58:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:58,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:58,898 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:59,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:59,098 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-06-05 13:58:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:59,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224397774] [2021-06-05 13:58:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:59,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:59,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224397774] [2021-06-05 13:58:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224397774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:59,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498686838] [2021-06-05 13:58:59,151 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:59,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:59,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:58:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:59,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498686838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:59,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:59,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:58:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11090043] [2021-06-05 13:58:59,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:58:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:58:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:58:59,205 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:59,370 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-06-05 13:58:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:58:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:58:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:59,383 INFO L225 Difference]: With dead ends: 10497 [2021-06-05 13:58:59,384 INFO L226 Difference]: Without dead ends: 10495 [2021-06-05 13:58:59,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-06-05 13:58:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-06-05 13:58:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-06-05 13:58:59,517 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-06-05 13:58:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:59,517 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-06-05 13:58:59,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-06-05 13:58:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:58:59,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:59,522 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:59,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3159,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:59,723 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-06-05 13:58:59,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:59,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623870591] [2021-06-05 13:58:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:59,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:59,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623870591] [2021-06-05 13:58:59,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623870591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:59,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560376848] [2021-06-05 13:58:59,776 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:58:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:58:59,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560376848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:59,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:59,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:58:59,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315405757] [2021-06-05 13:58:59,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:58:59,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:58:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:58:59,833 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:00,010 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-06-05 13:59:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:59:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:00,025 INFO L225 Difference]: With dead ends: 10502 [2021-06-05 13:59:00,025 INFO L226 Difference]: Without dead ends: 10499 [2021-06-05 13:59:00,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-06-05 13:59:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-06-05 13:59:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-06-05 13:59:00,177 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-06-05 13:59:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:00,177 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-06-05 13:59:00,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-06-05 13:59:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:00,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:00,183 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:00,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-06-05 13:59:00,384 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-06-05 13:59:00,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:00,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542094371] [2021-06-05 13:59:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:00,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:00,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542094371] [2021-06-05 13:59:00,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542094371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:00,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141216328] [2021-06-05 13:59:00,437 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:00,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:00,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141216328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:00,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:00,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:59:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586310579] [2021-06-05 13:59:00,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:00,493 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:00,633 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-06-05 13:59:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:00,651 INFO L225 Difference]: With dead ends: 11892 [2021-06-05 13:59:00,651 INFO L226 Difference]: Without dead ends: 11888 [2021-06-05 13:59:00,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-06-05 13:59:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-06-05 13:59:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-06-05 13:59:00,847 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-06-05 13:59:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:00,847 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-06-05 13:59:00,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-06-05 13:59:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:00,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:00,853 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:01,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3161,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:01,054 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:01,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-06-05 13:59:01,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:01,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300521659] [2021-06-05 13:59:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:01,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:01,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300521659] [2021-06-05 13:59:01,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300521659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:01,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243162774] [2021-06-05 13:59:01,110 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:01,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:59:01,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243162774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:01,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:59:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334479644] [2021-06-05 13:59:01,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:01,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:01,169 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:01,333 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-06-05 13:59:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:01,350 INFO L225 Difference]: With dead ends: 11434 [2021-06-05 13:59:01,350 INFO L226 Difference]: Without dead ends: 11429 [2021-06-05 13:59:01,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-06-05 13:59:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-06-05 13:59:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-06-05 13:59:01,504 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-06-05 13:59:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:01,504 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-06-05 13:59:01,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-06-05 13:59:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:01,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:01,510 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:01,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3162 [2021-06-05 13:59:01,711 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-06-05 13:59:01,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:01,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515409572] [2021-06-05 13:59:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:01,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515409572] [2021-06-05 13:59:01,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515409572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154503411] [2021-06-05 13:59:01,773 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:01,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:01,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:01,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:01,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154503411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:01,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:01,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:01,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559900323] [2021-06-05 13:59:01,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:01,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:01,830 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:01,994 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-06-05 13:59:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:02,010 INFO L225 Difference]: With dead ends: 11458 [2021-06-05 13:59:02,010 INFO L226 Difference]: Without dead ends: 11452 [2021-06-05 13:59:02,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-06-05 13:59:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-06-05 13:59:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-06-05 13:59:02,164 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-06-05 13:59:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:02,164 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-06-05 13:59:02,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-06-05 13:59:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:02,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:02,170 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:02,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-06-05 13:59:02,370 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:02,370 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-06-05 13:59:02,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:02,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552707604] [2021-06-05 13:59:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:02,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:02,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552707604] [2021-06-05 13:59:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552707604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:02,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959287401] [2021-06-05 13:59:02,452 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:02,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:59:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:02,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959287401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:02,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:02,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:02,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943958960] [2021-06-05 13:59:02,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:02,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:02,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:02,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:02,516 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:02,671 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-06-05 13:59:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:02,686 INFO L225 Difference]: With dead ends: 10600 [2021-06-05 13:59:02,686 INFO L226 Difference]: Without dead ends: 10594 [2021-06-05 13:59:02,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-06-05 13:59:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-06-05 13:59:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-06-05 13:59:02,833 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-06-05 13:59:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-06-05 13:59:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-06-05 13:59:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:02,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:02,840 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:03,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3164,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:03,040 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-06-05 13:59:03,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:03,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064159132] [2021-06-05 13:59:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:03,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064159132] [2021-06-05 13:59:03,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064159132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480643022] [2021-06-05 13:59:03,115 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:03,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:59:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:03,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480643022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:03,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:59:03,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062671200] [2021-06-05 13:59:03,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:03,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:03,178 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:03,320 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-06-05 13:59:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:03,335 INFO L225 Difference]: With dead ends: 10577 [2021-06-05 13:59:03,336 INFO L226 Difference]: Without dead ends: 10570 [2021-06-05 13:59:03,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-06-05 13:59:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-06-05 13:59:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-06-05 13:59:03,482 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-06-05 13:59:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:03,482 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-06-05 13:59:03,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-06-05 13:59:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:03,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:03,488 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:03,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3165 [2021-06-05 13:59:03,688 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-06-05 13:59:03,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:03,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611671211] [2021-06-05 13:59:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:03,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:03,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611671211] [2021-06-05 13:59:03,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611671211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719267648] [2021-06-05 13:59:03,764 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:03,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719267648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:03,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25303537] [2021-06-05 13:59:03,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:03,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:03,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:03,822 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:03,987 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-06-05 13:59:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:04,004 INFO L225 Difference]: With dead ends: 10543 [2021-06-05 13:59:04,004 INFO L226 Difference]: Without dead ends: 10535 [2021-06-05 13:59:04,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-06-05 13:59:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-06-05 13:59:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-06-05 13:59:04,149 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-06-05 13:59:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:04,149 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-06-05 13:59:04,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-06-05 13:59:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:04,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:04,155 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:04,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3166,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:04,356 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-06-05 13:59:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:04,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645312579] [2021-06-05 13:59:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:04,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645312579] [2021-06-05 13:59:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645312579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133495649] [2021-06-05 13:59:04,418 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:04,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:04,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:04,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133495649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:04,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:04,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:59:04,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417896596] [2021-06-05 13:59:04,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:04,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:04,477 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:04,614 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-06-05 13:59:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:59:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:04,628 INFO L225 Difference]: With dead ends: 10708 [2021-06-05 13:59:04,628 INFO L226 Difference]: Without dead ends: 10708 [2021-06-05 13:59:04,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-06-05 13:59:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-06-05 13:59:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-06-05 13:59:04,764 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-06-05 13:59:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:04,764 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-06-05 13:59:04,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-06-05 13:59:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:04,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:04,770 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:04,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3167,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:04,971 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-06-05 13:59:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:04,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783571604] [2021-06-05 13:59:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:05,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:05,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783571604] [2021-06-05 13:59:05,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783571604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:05,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441620211] [2021-06-05 13:59:05,036 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:05,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:59:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:05,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441620211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:05,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:05,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:59:05,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404071447] [2021-06-05 13:59:05,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:05,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:05,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:05,099 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:05,274 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-06-05 13:59:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:59:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:05,290 INFO L225 Difference]: With dead ends: 10785 [2021-06-05 13:59:05,290 INFO L226 Difference]: Without dead ends: 10778 [2021-06-05 13:59:05,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-06-05 13:59:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-06-05 13:59:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-06-05 13:59:05,446 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-06-05 13:59:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:05,447 INFO L482 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-06-05 13:59:05,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-06-05 13:59:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:05,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:05,453 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:05,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:05,654 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-06-05 13:59:05,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:05,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907239436] [2021-06-05 13:59:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:05,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907239436] [2021-06-05 13:59:05,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907239436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:05,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533093034] [2021-06-05 13:59:05,713 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:05,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:05,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:05,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:05,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533093034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:05,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:05,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973566250] [2021-06-05 13:59:05,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:05,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:05,771 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:05,945 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-06-05 13:59:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:59:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:05,960 INFO L225 Difference]: With dead ends: 11060 [2021-06-05 13:59:05,960 INFO L226 Difference]: Without dead ends: 11053 [2021-06-05 13:59:05,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-06-05 13:59:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-06-05 13:59:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-06-05 13:59:06,091 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-06-05 13:59:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:06,092 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-06-05 13:59:06,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-06-05 13:59:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:06,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:06,097 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:06,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:06,298 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-06-05 13:59:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:06,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27201888] [2021-06-05 13:59:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:06,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:06,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27201888] [2021-06-05 13:59:06,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27201888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:06,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356046347] [2021-06-05 13:59:06,361 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:06,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:59:06,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:06,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356046347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:06,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:06,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:06,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562367692] [2021-06-05 13:59:06,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:06,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:06,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:06,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:06,421 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:06,575 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-06-05 13:59:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:06,591 INFO L225 Difference]: With dead ends: 10685 [2021-06-05 13:59:06,591 INFO L226 Difference]: Without dead ends: 10678 [2021-06-05 13:59:06,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-06-05 13:59:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-06-05 13:59:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-06-05 13:59:06,773 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-06-05 13:59:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-06-05 13:59:06,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-06-05 13:59:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:06,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:06,780 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:06,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3170 [2021-06-05 13:59:06,981 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-06-05 13:59:06,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:06,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053045913] [2021-06-05 13:59:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:07,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:07,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053045913] [2021-06-05 13:59:07,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053045913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:07,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972421180] [2021-06-05 13:59:07,042 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:07,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:59:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:07,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972421180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:07,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:07,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:07,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14375607] [2021-06-05 13:59:07,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:07,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:07,104 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:07,270 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-06-05 13:59:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:59:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:07,286 INFO L225 Difference]: With dead ends: 11317 [2021-06-05 13:59:07,286 INFO L226 Difference]: Without dead ends: 11310 [2021-06-05 13:59:07,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-06-05 13:59:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-06-05 13:59:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-06-05 13:59:07,450 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-06-05 13:59:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:07,450 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-06-05 13:59:07,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-06-05 13:59:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:07,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:07,457 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:07,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:07,657 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-06-05 13:59:07,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:07,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723627394] [2021-06-05 13:59:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:07,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:07,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723627394] [2021-06-05 13:59:07,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723627394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:07,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190768164] [2021-06-05 13:59:07,720 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190768164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:07,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:07,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320245148] [2021-06-05 13:59:07,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:07,779 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:07,939 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-06-05 13:59:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:07,954 INFO L225 Difference]: With dead ends: 10745 [2021-06-05 13:59:07,955 INFO L226 Difference]: Without dead ends: 10738 [2021-06-05 13:59:07,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-06-05 13:59:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-06-05 13:59:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-06-05 13:59:08,084 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-06-05 13:59:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:08,085 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-06-05 13:59:08,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-06-05 13:59:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:08,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:08,090 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:08,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3172 [2021-06-05 13:59:08,291 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-06-05 13:59:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:08,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146148112] [2021-06-05 13:59:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:08,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146148112] [2021-06-05 13:59:08,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146148112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:08,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580337681] [2021-06-05 13:59:08,359 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:08,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:08,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580337681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:08,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:08,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:08,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871309088] [2021-06-05 13:59:08,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:08,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:08,416 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:08,578 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-06-05 13:59:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:08,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:08,594 INFO L225 Difference]: With dead ends: 10713 [2021-06-05 13:59:08,594 INFO L226 Difference]: Without dead ends: 10705 [2021-06-05 13:59:08,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-06-05 13:59:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-06-05 13:59:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-06-05 13:59:08,749 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-06-05 13:59:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:08,749 INFO L482 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-06-05 13:59:08,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-06-05 13:59:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:08,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:08,756 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:08,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 13:59:08,956 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-06-05 13:59:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725773130] [2021-06-05 13:59:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:09,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725773130] [2021-06-05 13:59:09,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725773130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310771192] [2021-06-05 13:59:09,011 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:09,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:59:09,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:09,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310771192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:09,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:09,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:59:09,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540149509] [2021-06-05 13:59:09,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:59:09,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:09,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:59:09,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:09,076 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:09,178 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-06-05 13:59:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:09,197 INFO L225 Difference]: With dead ends: 12763 [2021-06-05 13:59:09,197 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 13:59:09,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 13:59:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-06-05 13:59:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-06-05 13:59:09,452 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-06-05 13:59:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:09,452 INFO L482 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-06-05 13:59:09,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-06-05 13:59:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:09,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:09,460 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:09,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:09,665 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-06-05 13:59:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:09,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913299676] [2021-06-05 13:59:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:09,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:09,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913299676] [2021-06-05 13:59:09,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913299676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:09,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990990542] [2021-06-05 13:59:09,715 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:09,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:09,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990990542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:09,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:09,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:59:09,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903335912] [2021-06-05 13:59:09,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:09,772 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:59:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:09,883 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-06-05 13:59:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-06-05 13:59:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:09,904 INFO L225 Difference]: With dead ends: 12700 [2021-06-05 13:59:09,905 INFO L226 Difference]: Without dead ends: 12700 [2021-06-05 13:59:09,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-06-05 13:59:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-06-05 13:59:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-06-05 13:59:10,088 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-06-05 13:59:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:10,088 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-06-05 13:59:10,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-06-05 13:59:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-06-05 13:59:10,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:10,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:10,095 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:10,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-06-05 13:59:10,295 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-06-05 13:59:10,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:10,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664643708] [2021-06-05 13:59:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:10,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664643708] [2021-06-05 13:59:10,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664643708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505076507] [2021-06-05 13:59:10,345 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:10,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:59:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:10,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505076507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:10,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:10,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:59:10,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562340550] [2021-06-05 13:59:10,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:59:10,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:59:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:10,400 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:10,564 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-06-05 13:59:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:59:10,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:10,584 INFO L225 Difference]: With dead ends: 12712 [2021-06-05 13:59:10,584 INFO L226 Difference]: Without dead ends: 12710 [2021-06-05 13:59:10,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:59:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-06-05 13:59:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-06-05 13:59:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-06-05 13:59:10,779 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-06-05 13:59:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:10,779 INFO L482 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-06-05 13:59:10,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-06-05 13:59:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:10,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:10,786 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:10,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-06-05 13:59:10,987 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-06-05 13:59:10,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:10,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634408944] [2021-06-05 13:59:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:11,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634408944] [2021-06-05 13:59:11,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634408944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141065963] [2021-06-05 13:59:11,047 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:11,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:59:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141065963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:11,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:11,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:59:11,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503484443] [2021-06-05 13:59:11,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:11,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:11,107 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:11,271 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-06-05 13:59:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:59:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:11,289 INFO L225 Difference]: With dead ends: 12717 [2021-06-05 13:59:11,289 INFO L226 Difference]: Without dead ends: 12714 [2021-06-05 13:59:11,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-06-05 13:59:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-06-05 13:59:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-06-05 13:59:11,485 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-06-05 13:59:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:11,485 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-06-05 13:59:11,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-06-05 13:59:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:11,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:11,493 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:11,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3177 [2021-06-05 13:59:11,693 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-06-05 13:59:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:11,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841509748] [2021-06-05 13:59:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:11,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:11,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841509748] [2021-06-05 13:59:11,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841509748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:11,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115271108] [2021-06-05 13:59:11,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:11,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:11,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115271108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:11,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:11,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:59:11,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243558965] [2021-06-05 13:59:11,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:11,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:11,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:11,799 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:11,962 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-06-05 13:59:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:59:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:11,980 INFO L225 Difference]: With dead ends: 14561 [2021-06-05 13:59:11,980 INFO L226 Difference]: Without dead ends: 14557 [2021-06-05 13:59:11,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-06-05 13:59:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-06-05 13:59:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-06-05 13:59:12,200 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-06-05 13:59:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:12,200 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-06-05 13:59:12,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-06-05 13:59:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:12,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:12,207 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:12,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:12,408 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-06-05 13:59:12,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:12,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721125711] [2021-06-05 13:59:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:12,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721125711] [2021-06-05 13:59:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721125711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803050653] [2021-06-05 13:59:12,458 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:12,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:12,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:12,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803050653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:12,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:12,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:59:12,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548642281] [2021-06-05 13:59:12,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:12,515 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:12,681 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-06-05 13:59:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:59:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:12,705 INFO L225 Difference]: With dead ends: 14191 [2021-06-05 13:59:12,705 INFO L226 Difference]: Without dead ends: 14186 [2021-06-05 13:59:12,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-06-05 13:59:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-06-05 13:59:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-06-05 13:59:12,904 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-06-05 13:59:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:12,904 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-06-05 13:59:12,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-06-05 13:59:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:12,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:12,911 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:13,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:13,112 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-06-05 13:59:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:13,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12525318] [2021-06-05 13:59:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:13,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:13,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12525318] [2021-06-05 13:59:13,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12525318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:13,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191720180] [2021-06-05 13:59:13,167 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:13,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:59:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191720180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:59:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624335842] [2021-06-05 13:59:13,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:13,226 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:13,385 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-06-05 13:59:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:13,407 INFO L225 Difference]: With dead ends: 13610 [2021-06-05 13:59:13,407 INFO L226 Difference]: Without dead ends: 13604 [2021-06-05 13:59:13,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-06-05 13:59:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-06-05 13:59:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-06-05 13:59:13,612 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-06-05 13:59:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:13,612 INFO L482 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-06-05 13:59:13,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-06-05 13:59:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:13,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:13,620 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:13,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:13,820 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-06-05 13:59:13,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:13,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453752873] [2021-06-05 13:59:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:13,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:13,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453752873] [2021-06-05 13:59:13,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453752873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:13,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537634104] [2021-06-05 13:59:13,882 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:13,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:13,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537634104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:13,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:13,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:13,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580414096] [2021-06-05 13:59:13,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:13,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:13,939 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:14,114 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-06-05 13:59:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:59:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:14,135 INFO L225 Difference]: With dead ends: 13653 [2021-06-05 13:59:14,136 INFO L226 Difference]: Without dead ends: 13646 [2021-06-05 13:59:14,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-06-05 13:59:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-06-05 13:59:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-06-05 13:59:14,338 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-06-05 13:59:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:14,338 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-06-05 13:59:14,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-06-05 13:59:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:14,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:14,346 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:14,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3181,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:14,546 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-06-05 13:59:14,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:14,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842199905] [2021-06-05 13:59:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:14,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842199905] [2021-06-05 13:59:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842199905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823062596] [2021-06-05 13:59:14,609 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:14,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:59:14,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823062596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:14,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:14,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810486385] [2021-06-05 13:59:14,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:14,668 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:14,857 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-06-05 13:59:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:14,876 INFO L225 Difference]: With dead ends: 12749 [2021-06-05 13:59:14,876 INFO L226 Difference]: Without dead ends: 12742 [2021-06-05 13:59:14,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-06-05 13:59:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-06-05 13:59:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-06-05 13:59:15,056 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-06-05 13:59:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:15,056 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-06-05 13:59:15,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-06-05 13:59:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:15,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:15,063 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:15,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-05 13:59:15,264 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-06-05 13:59:15,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:15,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563300294] [2021-06-05 13:59:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:15,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:15,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563300294] [2021-06-05 13:59:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563300294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:15,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674818809] [2021-06-05 13:59:15,332 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:15,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:59:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 13:59:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:15,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674818809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:15,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:15,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:59:15,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651547316] [2021-06-05 13:59:15,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:15,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:15,393 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:15,543 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-06-05 13:59:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:15,558 INFO L225 Difference]: With dead ends: 12726 [2021-06-05 13:59:15,559 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 13:59:15,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 13:59:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-06-05 13:59:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-06-05 13:59:15,745 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-06-05 13:59:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:15,745 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-06-05 13:59:15,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-06-05 13:59:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:59:15,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:15,753 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:15,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3183 [2021-06-05 13:59:15,954 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-06-05 13:59:15,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:15,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134543690] [2021-06-05 13:59:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:16,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134543690] [2021-06-05 13:59:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134543690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959743572] [2021-06-05 13:59:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:16,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959743572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:16,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:16,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:59:16,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299080964] [2021-06-05 13:59:16,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:59:16,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:59:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:16,085 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:16,238 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-06-05 13:59:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:59:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:16,259 INFO L225 Difference]: With dead ends: 12691 [2021-06-05 13:59:16,259 INFO L226 Difference]: Without dead ends: 12682 [2021-06-05 13:59:16,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-06-05 13:59:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-06-05 13:59:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-06-05 13:59:16,458 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-06-05 13:59:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:16,458 INFO L482 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-06-05 13:59:16,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-06-05 13:59:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:59:16,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:16,466 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:16,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 13:59:16,667 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:16,667 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-06-05 13:59:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:16,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871921849] [2021-06-05 13:59:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:59:16,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871921849] [2021-06-05 13:59:16,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871921849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:16,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377930190] [2021-06-05 13:59:16,779 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:16,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:59:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377930190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:16,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:16,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 13:59:16,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885403200] [2021-06-05 13:59:16,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:16,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:16,927 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-06-05 13:59:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:17,092 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-06-05 13:59:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 22 [2021-06-05 13:59:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:17,112 INFO L225 Difference]: With dead ends: 16028 [2021-06-05 13:59:17,112 INFO L226 Difference]: Without dead ends: 16028 [2021-06-05 13:59:17,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-06-05 13:59:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-06-05 13:59:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-06-05 13:59:17,390 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-06-05 13:59:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:17,390 INFO L482 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-06-05 13:59:17,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-06-05 13:59:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-06-05 13:59:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:59:17,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:17,399 INFO L521 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:17,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-06-05 13:59:17,599 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-06-05 13:59:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:17,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939928063] [2021-06-05 13:59:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:59:17,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939928063] [2021-06-05 13:59:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939928063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833350705] [2021-06-05 13:59:17,747 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:59:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:59:17,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833350705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:17,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:17,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 13:59:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186981583] [2021-06-05 13:59:17,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 13:59:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 13:59:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:17,934 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-06-05 13:59:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:18,132 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-06-05 13:59:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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 23 [2021-06-05 13:59:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:18,153 INFO L225 Difference]: With dead ends: 17733 [2021-06-05 13:59:18,154 INFO L226 Difference]: Without dead ends: 17728 [2021-06-05 13:59:18,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-06-05 13:59:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-06-05 13:59:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-06-05 13:59:18,379 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-06-05 13:59:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:18,379 INFO L482 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-06-05 13:59:18,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-06-05 13:59:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-06-05 13:59:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:59:18,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:18,390 INFO L521 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:18,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-06-05 13:59:18,590 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-06-05 13:59:18,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:18,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54065028] [2021-06-05 13:59:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:18,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54065028] [2021-06-05 13:59:18,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54065028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039982369] [2021-06-05 13:59:18,677 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:18,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:59:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:19,266 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-06-05 13:59:19,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-06-05 13:59:19,643 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 206 [2021-06-05 13:59:20,260 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 335 [2021-06-05 13:59:20,433 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 347 [2021-06-05 13:59:21,018 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 322 [2021-06-05 13:59:21,650 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 445 [2021-06-05 13:59:21,930 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 457 [2021-06-05 13:59:22,493 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 680 [2021-06-05 13:59:23,174 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 709 [2021-06-05 13:59:24,081 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 288 [2021-06-05 13:59:24,266 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 398 [2021-06-05 13:59:24,526 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 410 [2021-06-05 13:59:25,836 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 378 [2021-06-05 13:59:26,141 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 524 [2021-06-05 13:59:26,506 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 536 [2021-06-05 13:59:27,239 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 787 [2021-06-05 13:59:28,116 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 815 [2021-06-05 13:59:29,825 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-06-05 13:59:31,207 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 393 [2021-06-05 13:59:31,534 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 535 [2021-06-05 13:59:31,930 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 545 [2021-06-05 13:59:32,956 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 302 [2021-06-05 13:59:33,176 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 441 [2021-06-05 13:59:33,454 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 451 [2021-06-05 13:59:34,280 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 1021 DAG size of output: 856 [2021-06-05 13:59:35,285 WARN L205 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 882 [2021-06-05 13:59:36,024 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 329 [2021-06-05 13:59:36,512 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2021-06-05 13:59:37,121 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 453 [2021-06-05 13:59:37,535 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 619 [2021-06-05 13:59:38,059 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 717 DAG size of output: 629 [2021-06-05 13:59:38,648 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 316 [2021-06-05 13:59:39,428 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 359 [2021-06-05 13:59:39,718 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 517 [2021-06-05 13:59:40,091 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 527 [2021-06-05 13:59:41,135 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1157 DAG size of output: 982 [2021-06-05 13:59:42,379 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1181 DAG size of output: 1006 [2021-06-05 13:59:44,820 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 2034 DAG size of output: 1643 [2021-06-05 13:59:49,607 WARN L205 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-06-05 13:59:54,411 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 3473 DAG size of output: 2729 [2021-06-05 14:00:00,123 WARN L205 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 3492 DAG size of output: 2748 [2021-06-05 14:00:13,825 WARN L205 SmtUtils]: Spent 13.68 s on a formula simplification. DAG size of input: 2750 DAG size of output: 3883 [2021-06-05 14:00:24,047 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 2554 DAG size of output: 2416 [2021-06-05 14:00:32,967 WARN L205 SmtUtils]: Spent 8.90 s on a formula simplification. DAG size of input: 2374 DAG size of output: 2990 [2021-06-05 14:00:33,139 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 1127 [2021-06-05 14:00:33,692 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 622 [2021-06-05 14:00:34,121 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 437 [2021-06-05 14:00:34,371 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 378 [2021-06-05 14:00:35,285 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 247 [2021-06-05 14:00:35,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 232 [2021-06-05 14:00:36,743 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 282 [2021-06-05 14:00:36,975 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 360 [2021-06-05 14:00:37,293 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 410 [2021-06-05 14:00:37,998 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 228 [2021-06-05 14:00:38,327 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 266 [2021-06-05 14:00:38,517 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 309 [2021-06-05 14:00:39,310 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 705 [2021-06-05 14:00:40,132 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 723 [2021-06-05 14:00:41,312 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 904 DAG size of output: 881 [2021-06-05 14:00:42,782 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 912 DAG size of output: 885 [2021-06-05 14:00:44,567 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1004 DAG size of output: 1043 [2021-06-05 14:00:44,918 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 390 [2021-06-05 14:00:45,147 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 358 [2021-06-05 14:00:45,334 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 356 [2021-06-05 14:00:46,518 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 274 [2021-06-05 14:00:47,808 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 420 [2021-06-05 14:00:48,146 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 429 [2021-06-05 14:00:48,580 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 437 [2021-06-05 14:00:49,230 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 573 [2021-06-05 14:00:50,199 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 711 [2021-06-05 14:00:51,455 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 806 DAG size of output: 827 [2021-06-05 14:00:54,940 WARN L205 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 1599 DAG size of output: 1609 [2021-06-05 14:00:58,879 WARN L205 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 1684 DAG size of output: 1612 [2021-06-05 14:01:00,661 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 734 DAG size of output: 755 [2021-06-05 14:01:01,946 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 686 DAG size of output: 850 [2021-06-05 14:01:02,971 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 677 DAG size of output: 885 [2021-06-05 14:01:03,975 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 830 [2021-06-05 14:01:05,006 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 669 DAG size of output: 809 [2021-06-05 14:01:05,425 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 523 [2021-06-05 14:01:05,952 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 543 [2021-06-05 14:01:06,562 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 230 [2021-06-05 14:01:06,997 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 280 [2021-06-05 14:01:07,145 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 286 [2021-06-05 14:01:07,521 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 513 [2021-06-05 14:01:08,908 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 323 [2021-06-05 14:01:09,112 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 332 [2021-06-05 14:01:09,787 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 705 [2021-06-05 14:01:10,663 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 819 DAG size of output: 712 [2021-06-05 14:01:10,997 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 491 [2021-06-05 14:01:12,268 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 357 [2021-06-05 14:01:12,480 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 366 [2021-06-05 14:01:12,738 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 374 [2021-06-05 14:01:13,367 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 501 [2021-06-05 14:01:14,834 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 462 [2021-06-05 14:01:15,516 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 655 [2021-06-05 14:01:17,389 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1360 DAG size of output: 1178 [2021-06-05 14:01:18,058 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 225 [2021-06-05 14:01:18,725 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 275 [2021-06-05 14:01:19,410 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 456 [2021-06-05 14:01:19,706 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 465 [2021-06-05 14:01:20,118 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 472 [2021-06-05 14:01:21,896 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 389 [2021-06-05 14:01:22,144 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 399 [2021-06-05 14:01:22,521 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 406 [2021-06-05 14:01:23,396 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 740 [2021-06-05 14:01:26,298 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 1844 DAG size of output: 1588 [2021-06-05 14:01:30,232 WARN L205 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 2295 DAG size of output: 2037 [2021-06-05 14:01:35,367 WARN L205 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 2693 DAG size of output: 2396 [2021-06-05 14:01:41,633 WARN L205 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 2993 DAG size of output: 2672 [2021-06-05 14:01:48,909 WARN L205 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 3079 DAG size of output: 2675 [2021-06-05 14:02:00,870 WARN L205 SmtUtils]: Spent 11.94 s on a formula simplification. DAG size of input: 4511 DAG size of output: 4036 [2021-06-05 14:02:09,626 WARN L205 SmtUtils]: Spent 8.73 s on a formula simplification. DAG size of input: 2123 DAG size of output: 2258 [2021-06-05 14:02:09,830 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 1944 [2021-06-05 14:02:09,945 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 1194 [2021-06-05 14:02:10,775 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 896 [2021-06-05 14:02:10,906 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 703 [2021-06-05 14:02:11,729 WARN L205 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 936 [2021-06-05 14:02:12,600 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 904 [2021-06-05 14:02:13,805 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 307 [2021-06-05 14:02:14,958 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 303 [2021-06-05 14:02:15,750 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-06-05 14:02:16,765 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-06-05 14:02:17,130 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 435 [2021-06-05 14:02:18,073 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 726 [2021-06-05 14:02:19,114 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 752 [2021-06-05 14:02:20,863 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1436 DAG size of output: 1169 [2021-06-05 14:02:23,488 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 1888 DAG size of output: 1541 [2021-06-05 14:02:26,601 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 1897 DAG size of output: 1548 [2021-06-05 14:02:30,541 WARN L205 SmtUtils]: Spent 3.93 s on a formula simplification. DAG size of input: 2194 DAG size of output: 1841 [2021-06-05 14:02:31,325 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 715 [2021-06-05 14:02:32,639 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 640 DAG size of output: 860 [2021-06-05 14:02:33,106 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 624 [2021-06-05 14:02:33,404 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 524 [2021-06-05 14:02:33,605 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 381 [2021-06-05 14:02:33,755 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-06-05 14:02:34,588 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 235 [2021-06-05 14:02:35,477 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 386 [2021-06-05 14:02:37,045 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 282 [2021-06-05 14:02:37,235 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 308 [2021-06-05 14:02:38,028 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 497 [2021-06-05 14:02:38,770 WARN L205 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 844 DAG size of output: 680 [2021-06-05 14:02:39,852 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1059 DAG size of output: 896 [2021-06-05 14:02:41,261 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1274 DAG size of output: 1024 [2021-06-05 14:02:42,691 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1307 DAG size of output: 1050 [2021-06-05 14:02:44,604 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 1584 DAG size of output: 1241 [2021-06-05 14:02:46,856 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 1592 DAG size of output: 1248 [2021-06-05 14:02:49,995 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 1990 DAG size of output: 1585 [2021-06-05 14:02:54,053 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 2392 DAG size of output: 2000 [2021-06-05 14:03:02,950 WARN L205 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 4262 DAG size of output: 3485 [2021-06-05 14:03:04,414 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 961 DAG size of output: 1156 [2021-06-05 14:03:04,840 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 504 [2021-06-05 14:03:04,976 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 357 [2021-06-05 14:03:06,149 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 338 [2021-06-05 14:03:06,433 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 474 [2021-06-05 14:03:06,832 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 517 [2021-06-05 14:03:07,329 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 619 [2021-06-05 14:03:07,476 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 338 [2021-06-05 14:03:08,034 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 274 [2021-06-05 14:03:08,507 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 268 [2021-06-05 14:03:09,028 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 280 [2021-06-05 14:03:09,191 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 330 [2021-06-05 14:03:09,447 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 412 [2021-06-05 14:03:09,998 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 715 DAG size of output: 646 [2021-06-05 14:03:10,932 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 251 [2021-06-05 14:03:11,584 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 405 [2021-06-05 14:03:12,654 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 922 DAG size of output: 836 [2021-06-05 14:03:14,280 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1275 DAG size of output: 1138 [2021-06-05 14:03:16,063 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 1319 DAG size of output: 1174 [2021-06-05 14:03:18,207 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 1510 DAG size of output: 1345 [2021-06-05 14:03:20,709 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 1517 DAG size of output: 1351 [2021-06-05 14:03:21,471 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 654 [2021-06-05 14:03:21,927 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 516 [2021-06-05 14:03:23,981 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 302 [2021-06-05 14:03:24,335 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 407 [2021-06-05 14:03:24,821 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 535 [2021-06-05 14:03:25,329 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 553 [2021-06-05 14:03:25,984 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 562 [2021-06-05 14:03:26,959 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 782 [2021-06-05 14:03:28,401 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1132 DAG size of output: 1059 [2021-06-05 14:03:32,870 WARN L205 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 2465 DAG size of output: 2167 [2021-06-05 14:03:38,864 WARN L205 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 2888 DAG size of output: 2603 [2021-06-05 14:03:55,812 WARN L205 SmtUtils]: Spent 16.92 s on a formula simplification. DAG size of input: 6771 DAG size of output: 5743 [2021-06-05 14:04:14,510 WARN L205 SmtUtils]: Spent 18.66 s on a formula simplification. DAG size of input: 7100 DAG size of output: 5765 [2021-06-05 14:04:45,082 WARN L205 SmtUtils]: Spent 30.53 s on a formula simplification. DAG size of input: 10885 DAG size of output: 8680 [2021-06-05 14:05:20,040 WARN L205 SmtUtils]: Spent 34.90 s on a formula simplification. DAG size of input: 10943 DAG size of output: 8731 [2021-06-05 14:05:20,367 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 2534 [2021-06-05 14:05:23,981 WARN L205 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 1494 DAG size of output: 1464 [2021-06-05 14:05:27,215 WARN L205 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 1448 DAG size of output: 1789 [2021-06-05 14:05:29,214 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 704 DAG size of output: 759 [2021-06-05 14:05:30,602 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 660 DAG size of output: 862 [2021-06-05 14:05:31,748 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 649 DAG size of output: 869 [2021-06-05 14:05:32,484 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 506 [2021-06-05 14:05:33,036 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 470 [2021-06-05 14:05:34,776 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 343 [2021-06-05 14:05:36,005 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 298 [2021-06-05 14:05:36,319 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 486 [2021-06-05 14:05:36,626 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 492 [2021-06-05 14:05:37,049 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 499 [2021-06-05 14:05:37,855 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 736 [2021-06-05 14:05:38,261 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 455 [2021-06-05 14:05:40,105 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 318 [2021-06-05 14:05:40,437 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 523 [2021-06-05 14:05:40,794 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 532 [2021-06-05 14:05:41,237 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 538 [2021-06-05 14:05:42,698 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1311 DAG size of output: 1072 [2021-06-05 14:05:45,118 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 1688 DAG size of output: 1437 [2021-06-05 14:05:48,338 WARN L205 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 1981 DAG size of output: 1716 [2021-06-05 14:05:52,047 WARN L205 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 2095 DAG size of output: 1719 [2021-06-05 14:05:58,362 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 1318 DAG size of output: 1377 [2021-06-05 14:06:00,803 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1157 DAG size of output: 1494 [2021-06-05 14:06:05,077 WARN L205 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 1152 DAG size of output: 1635 [2021-06-05 14:06:07,783 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1512 [2021-06-05 14:06:09,141 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 587 DAG size of output: 789 [2021-06-05 14:06:09,727 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 449 [2021-06-05 14:06:10,072 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 468 [2021-06-05 14:06:10,440 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 384 [2021-06-05 14:06:11,498 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 314 [2021-06-05 14:06:11,650 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 325 [2021-06-05 14:06:12,068 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 418 [2021-06-05 14:06:13,008 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 294 [2021-06-05 14:06:13,121 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 302 [2021-06-05 14:06:13,491 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 344 [2021-06-05 14:06:13,809 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 455 [2021-06-05 14:06:15,172 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 303 [2021-06-05 14:06:15,306 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 314 [2021-06-05 14:06:15,812 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 646 [2021-06-05 14:06:16,493 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 653 [2021-06-05 14:06:18,990 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 364 [2021-06-05 14:06:19,250 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 375 [2021-06-05 14:06:19,540 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 380 [2021-06-05 14:06:20,670 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1152 DAG size of output: 887 [2021-06-05 14:06:22,752 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1588 DAG size of output: 1285 [2021-06-05 14:06:26,806 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 2577 DAG size of output: 2019 [2021-06-05 14:06:33,154 WARN L205 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 3398 DAG size of output: 2696 [2021-06-05 14:06:41,606 WARN L205 SmtUtils]: Spent 8.43 s on a formula simplification. DAG size of input: 4036 DAG size of output: 3293 [2021-06-05 14:06:51,291 WARN L205 SmtUtils]: Spent 9.66 s on a formula simplification. DAG size of input: 4276 DAG size of output: 3318 [2021-06-05 14:07:06,120 WARN L205 SmtUtils]: Spent 14.81 s on a formula simplification. DAG size of input: 5882 DAG size of output: 4640 [2021-06-05 14:07:23,326 WARN L205 SmtUtils]: Spent 17.17 s on a formula simplification. DAG size of input: 5909 DAG size of output: 4666 [2021-06-05 14:07:26,940 WARN L205 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 1241 DAG size of output: 1212 [2021-06-05 14:07:29,264 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 1196 DAG size of output: 1415 [2021-06-05 14:07:30,090 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 621 [2021-06-05 14:07:30,681 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 660 [2021-06-05 14:07:31,634 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 681 [2021-06-05 14:07:32,001 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 486 [2021-06-05 14:07:32,162 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 373 [2021-06-05 14:07:32,583 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 315 [2021-06-05 14:07:33,677 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 255 [2021-06-05 14:07:34,202 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 312 [2021-06-05 14:07:34,477 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 421 [2021-06-05 14:07:34,771 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 430 [2021-06-05 14:07:35,197 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 539 [2021-06-05 14:07:35,872 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 712 [2021-06-05 14:07:36,693 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 719 [2021-06-05 14:07:38,062 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 1112 DAG size of output: 993 [2021-06-05 14:07:39,935 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1316 DAG size of output: 1226 [2021-06-05 14:07:42,115 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1408 DAG size of output: 1229 [2021-06-05 14:07:43,124 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 728 [2021-06-05 14:07:43,743 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 687 [2021-06-05 14:07:44,163 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 535 [2021-06-05 14:07:45,180 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 301 [2021-06-05 14:07:45,846 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 14:07:46,173 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 421 [2021-06-05 14:07:46,861 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 261 [2021-06-05 14:07:47,554 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 268 [2021-06-05 14:07:47,736 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 331 [2021-06-05 14:07:48,442 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 267 [2021-06-05 14:07:48,622 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 218 [2021-06-05 14:07:49,064 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 291 [2021-06-05 14:07:49,442 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 432 [2021-06-05 14:07:49,976 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 543 [2021-06-05 14:07:51,128 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1057 DAG size of output: 892 [2021-06-05 14:07:52,294 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 1074 DAG size of output: 910 [2021-06-05 14:07:53,845 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 1280 DAG size of output: 1096 [2021-06-05 14:07:55,680 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1287 DAG size of output: 1103 [2021-06-05 14:07:58,131 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 1531 DAG size of output: 1375 [2021-06-05 14:08:00,972 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 1682 DAG size of output: 1378 [2021-06-05 14:08:06,530 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 2845 DAG size of output: 2269 [2021-06-05 14:08:06,840 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 443 [2021-06-05 14:08:07,289 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 443 [2021-06-05 14:08:07,597 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 405 [2021-06-05 14:08:08,018 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 432 [2021-06-05 14:08:08,399 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 439 [2021-06-05 14:08:10,469 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 338 [2021-06-05 14:08:10,880 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 479 [2021-06-05 14:08:11,428 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 490 [2021-06-05 14:08:12,301 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 647 [2021-06-05 14:08:13,477 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 791 DAG size of output: 747 [2021-06-05 14:08:14,819 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 870 DAG size of output: 750 [2021-06-05 14:08:14,969 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 371 [2021-06-05 14:08:15,262 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 398 [2021-06-05 14:08:15,438 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 358 [2021-06-05 14:08:16,978 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 316 [2021-06-05 14:08:17,157 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 324 [2021-06-05 14:08:17,560 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 476 [2021-06-05 14:08:18,129 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 609 [2021-06-05 14:08:18,818 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 612 [2021-06-05 14:08:19,658 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 617 [2021-06-05 14:08:22,257 WARN L205 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 1361 DAG size of output: 1160 [2021-06-05 14:08:31,508 WARN L205 SmtUtils]: Spent 9.24 s on a formula simplification. DAG size of input: 3674 DAG size of output: 3077 [2021-06-05 14:08:42,217 WARN L205 SmtUtils]: Spent 10.69 s on a formula simplification. DAG size of input: 3702 DAG size of output: 3106 [2021-06-05 14:09:13,102 WARN L205 SmtUtils]: Spent 30.83 s on a formula simplification. DAG size of input: 9204 DAG size of output: 7360 [2021-06-05 14:10:21,357 WARN L205 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 17329 DAG size of output: 12965 [2021-06-05 14:11:29,906 WARN L205 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 17329 DAG size of output: 12965 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown